feat: phase 7 automation & realtime — scheduled jobs, domain events, SSE

Scheduled jobs (migration 00009): cron expressions + @every descriptors,
in-process scheduler (15s scan, missed-run collapse), signed HTTP POST
delivery (X-Primora-Signature), AES-256-GCM sealed secrets returned once,
run history with status/duration/http-code, manual execution, retention
pruning. Viewer reads, admin/developer writes.

Domain events: publishEvent fans document/object/issue/deploy/job
mutations to realtime subscribers and matching webhooks through one
path. Webhook event filter extended to job.run, document.*, object.*.

Realtime: GET /projects/:id/realtime/stream SSE with 25s keepalives and
?token=/?api_key= auth for EventSource clients.

Automation dashboard page: Schedules tab (CRUD, run history, manual run,
secret-once banner) + Live events tab (live badge, pause/clear). Demo
mode parity. primora jobs:* CLI group, six primora_*_job* MCP tools,
AutomationService in the generated client.

Fixes folded in: gzip middleware buffered SSE flushes (broke EventSource
on both streams — */stream now bypasses compression); event payloads
double-marshaled json.RawMessage as base64; compose hardcoded localhost
trusted origins so non-default ports broke sign-in; frontend auth base
URL baked an absolute localhost instead of resolving /auth on origin.

Verified live: stack up on :8085, signed delivery HMAC-checked at sink,
@every 30s schedule firing, run history rendering, document.created
landing in the live events feed.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/backend/db/queries/jobs.sql

@@ -0,0 +1,88 @@
+-- name: ListScheduledJobs :many
+SELECT * FROM core.scheduled_jobs
+WHERE project_id = $1
+ORDER BY created_at ASC;
+
+-- name: GetScheduledJobByID :one
+SELECT * FROM core.scheduled_jobs
+WHERE id = $1;
+
+-- name: CreateScheduledJob :one
+INSERT INTO core.scheduled_jobs (
+  project_id,
+  name,
+  schedule,
+  url,
+  secret,
+  payload,
+  enabled,
+  next_run_at,
+  created_by_user_id
+) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+RETURNING *;
+
+-- name: UpdateScheduledJob :one
+UPDATE core.scheduled_jobs
+SET name = $3,
+    schedule = $4,
+    url = $5,
+    enabled = $6,
+    next_run_at = $7,
+    secret = CASE WHEN $8::boolean THEN $9 ELSE secret END,
+    payload = CASE WHEN $10::boolean THEN $11 ELSE payload END,
+    updated_at = NOW()
+WHERE id = $1
+  AND project_id = $2
+RETURNING *;
+
+-- name: DeleteScheduledJob :one
+DELETE FROM core.scheduled_jobs
+WHERE id = $1
+  AND project_id = $2
+RETURNING id;
+
+-- name: ListDueScheduledJobs :many
+SELECT * FROM core.scheduled_jobs
+WHERE enabled
+  AND next_run_at IS NOT NULL
+  AND next_run_at <= $1;
+
+-- name: MarkScheduledJobRan :one
+UPDATE core.scheduled_jobs
+SET last_run_at = $2,
+    last_status = $3,
+    next_run_at = $4,
+    updated_at = NOW()
+WHERE id = $1
+RETURNING *;
+
+-- name: InsertScheduledJobRun :one
+INSERT INTO core.scheduled_job_runs (job_id, triggered_by)
+VALUES ($1, $2)
+RETURNING *;
+
+-- name: FinishScheduledJobRun :one
+UPDATE core.scheduled_job_runs
+SET status = $2,
+    status_code = $3,
+    error = $4,
+    duration_ms = $5,
+    finished_at = NOW()
+WHERE id = $1
+RETURNING *;
+
+-- name: ListScheduledJobRuns :many
+SELECT * FROM core.scheduled_job_runs
+WHERE job_id = $1
+ORDER BY created_at DESC
+LIMIT $2;
+
+-- name: PruneScheduledJobRuns :exec
+DELETE FROM core.scheduled_job_runs r
+WHERE r.job_id = $1
+  AND r.id NOT IN (
+    SELECT k.id FROM core.scheduled_job_runs k
+    WHERE k.job_id = $1
+    ORDER BY k.created_at DESC
+    LIMIT $2
+  );