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feat: system monitoring + push agent (merge plan M3)
systems + system_stats tables; agents push JSON every N seconds to POST /api/systems/ingest with a per-system bearer token. The server stores each sample, keeps a `latest` snapshot for cheap list/widget reads, prunes stats after 7d, and marks systems down when silent > max(3x interval, 30s) — firing system.up/down webhook events on transitions. cmd/dash-agent is a standalone Linux collector: /proc for cpu/mem/net/load/uptime, /sys hwmon temps, statfs disk, and container liveness via /var/run/docker.sock when present. No imports from the server module — the sample shape is duplicated deliberately so the agent stays a single static binary. Frontend: /systems card grid with usage bars, /systems/:id with recharts cpu/mem/net/load, temps + containers tables, and the agent command; `system` board widget; nav + palette + WidgetDialog picker wired. Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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@@ -551,6 +551,129 @@ paths:
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"400":
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$ref: "#/components/responses/BadRequest"
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/api/systems:
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get:
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operationId: listSystems
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responses:
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"200":
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description: All monitored systems with their latest sample
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content:
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application/json:
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schema:
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type: array
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items:
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$ref: "#/components/schemas/System"
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post:
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operationId: createSystem
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summary: Register a system; the returned token authenticates agent pushes
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requestBody:
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required: true
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content:
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application/json:
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schema:
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type: object
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required: [name]
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properties:
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name: { type: string }
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responses:
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"201":
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description: Created system
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content:
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application/json:
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schema:
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$ref: "#/components/schemas/System"
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"400":
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$ref: "#/components/responses/BadRequest"
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/api/systems/{id}:
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parameters:
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- $ref: "#/components/parameters/id"
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get:
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operationId: getSystem
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responses:
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"200":
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description: System detail
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content:
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application/json:
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schema:
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$ref: "#/components/schemas/System"
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"404":
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$ref: "#/components/responses/NotFound"
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patch:
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operationId: patchSystem
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summary: Rename or rotate the agent token
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requestBody:
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required: true
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content:
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application/json:
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schema:
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type: object
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properties:
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name: { type: string }
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rotateToken: { type: boolean }
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responses:
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"200":
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description: Updated system
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content:
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application/json:
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schema:
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$ref: "#/components/schemas/System"
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"404":
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$ref: "#/components/responses/NotFound"
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delete:
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operationId: deleteSystem
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responses:
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"204":
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description: Deleted
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"404":
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$ref: "#/components/responses/NotFound"
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/api/systems/{id}/stats:
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parameters:
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- $ref: "#/components/parameters/id"
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get:
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operationId: systemStats
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summary: Stored agent samples for charting
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parameters:
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- name: hours
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in: query
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schema: { type: integer, default: 24, maximum: 168 }
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responses:
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"200":
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description: Samples oldest-to-newest
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content:
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application/json:
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schema:
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type: array
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items:
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allOf:
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- $ref: "#/components/schemas/StatSample"
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- type: object
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properties:
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ts: { type: string, format: date-time }
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"404":
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$ref: "#/components/responses/NotFound"
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/api/systems/ingest:
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post:
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operationId: ingestSystem
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summary: "Agent push endpoint; Authorization: Bearer <system token>"
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security:
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- bearerAuth: []
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requestBody:
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required: true
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content:
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application/json:
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schema:
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$ref: "#/components/schemas/StatSample"
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responses:
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"200":
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description: Sample stored
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"401":
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description: Missing or unknown token
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"400":
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$ref: "#/components/responses/BadRequest"
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/api/settings:
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get:
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operationId: getSettings
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@@ -650,6 +773,10 @@ paths:
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$ref: "#/components/responses/BadRequest"
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components:
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securitySchemes:
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bearerAuth:
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type: http
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scheme: bearer
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parameters:
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id:
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name: id
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@@ -1188,6 +1315,71 @@ components:
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checkedAt:
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type: string
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format: date-time
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StatSample:
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type: object
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description: One agent push; missing fields mean the platform can't provide them
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properties:
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host: { type: string }
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os: { type: string }
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arch: { type: string }
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cpuModel: { type: string }
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cores: { type: integer }
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intervalS: { type: integer }
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uptimeS: { type: number }
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cpu:
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type: number
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description: CPU usage percent 0-100
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memTotal: { type: number, description: bytes }
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memUsed: { type: number, description: bytes }
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swapTotal: { type: number, description: bytes }
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swapUsed: { type: number, description: bytes }
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diskTotal: { type: number, description: root filesystem bytes }
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diskUsed: { type: number, description: bytes }
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netRx: { type: number, description: bytes per second }
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netTx: { type: number, description: bytes per second }
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load1: { type: number }
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load5: { type: number }
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load15: { type: number }
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temps:
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type: object
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additionalProperties: { type: number }
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description: Sensor label -> celsius
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containers:
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type: array
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items:
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$ref: "#/components/schemas/ContainerStat"
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ContainerStat:
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type: object
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properties:
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name: { type: string }
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state: { type: string }
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System:
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type: object
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required: [id, name, token, status]
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properties:
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id: { type: string }
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name: { type: string }
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token:
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type: string
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description: Agent bearer token
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host: { type: string }
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os: { type: string }
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arch: { type: string }
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cpuModel: { type: string }
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cores: { type: integer }
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intervalS: { type: integer }
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status:
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type: string
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enum: [pending, up, down]
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lastSeenAt:
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type: string
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format: date-time
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nullable: true
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latest:
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$ref: "#/components/schemas/StatSample"
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createdAt:
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type: string
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format: date-time
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WidgetField:
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type: object
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required: [key, label]
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