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/services/telemetry.go

@@ -192,9 +192,9 @@ func (s *PlatformService) IngestEvents(ctx context.Context, actor *models.Actor,
 	for _, ev := range inserted {
 		s.hub.Broadcast(ev.ProjectID.String(), ev)
 	}
-	// A fresh error fingerprint is a new issue group — notify webhooks.
+	// A fresh error fingerprint is a new issue group — notify webhooks + SSE.
 	for _, issue := range newIssues {
-		s.dispatchEvent(ctx, projectID, WebhookEventIssueCreated, map[string]any{
+		s.publishEvent(ctx, projectID, WebhookEventIssueCreated, map[string]any{
 			"fingerprint":    issue.Fingerprint,
 			"message":        issue.Message,
 			"severity":       issue.Severity,