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/internal/database/db/models.go

@@ -307,6 +307,35 @@ type CoreProjectMember struct {
 	CreatedAt pgtype.Timestamptz `json:"created_at"`
 }
 
+type CoreScheduledJob struct {
+	ID              uuid.UUID          `json:"id"`
+	ProjectID       uuid.UUID          `json:"project_id"`
+	Name            string             `json:"name"`
+	Schedule        string             `json:"schedule"`
+	Url             string             `json:"url"`
+	Secret          []byte             `json:"secret"`
+	Payload         []byte             `json:"payload"`
+	Enabled         bool               `json:"enabled"`
+	LastRunAt       pgtype.Timestamptz `json:"last_run_at"`
+	LastStatus      string             `json:"last_status"`
+	NextRunAt       pgtype.Timestamptz `json:"next_run_at"`
+	CreatedByUserID pgtype.UUID        `json:"created_by_user_id"`
+	CreatedAt       pgtype.Timestamptz `json:"created_at"`
+	UpdatedAt       pgtype.Timestamptz `json:"updated_at"`
+}
+
+type CoreScheduledJobRun struct {
+	ID          uuid.UUID          `json:"id"`
+	JobID       uuid.UUID          `json:"job_id"`
+	Status      string             `json:"status"`
+	TriggeredBy string             `json:"triggered_by"`
+	StatusCode  *int32             `json:"status_code"`
+	Error       string             `json:"error"`
+	DurationMs  *int32             `json:"duration_ms"`
+	CreatedAt   pgtype.Timestamptz `json:"created_at"`
+	FinishedAt  pgtype.Timestamptz `json:"finished_at"`
+}
+
 type CoreUser struct {
 	ID            uuid.UUID          `json:"id"`
 	AuthSubject   string             `json:"auth_subject"`