feat(#176): Integrate M4.2 infrastructure with M4.1 coordinator

Add CoordinatorIntegrationModule providing REST API endpoints for the Python
coordinator to communicate with the NestJS API infrastructure:

- POST /coordinator/jobs - Create job from coordinator webhook events
- PATCH /coordinator/jobs/:id/status - Update job status (PENDING -> RUNNING)
- PATCH /coordinator/jobs/:id/progress - Update job progress percentage
- POST /coordinator/jobs/:id/complete - Mark job complete with results
- POST /coordinator/jobs/:id/fail - Mark job failed with gate results
- GET /coordinator/jobs/:id - Get job details with events and steps
- GET /coordinator/health - Integration health check

Integration features:
- Job creation dispatches to BullMQ queues
- Status updates emit JobEvents for audit logging
- Completion/failure events broadcast via Herald to Discord
- Status transition validation (PENDING -> QUEUED -> RUNNING -> COMPLETED/FAILED)
- Health check includes BullMQ connection status and queue counts

Also adds JOB_PROGRESS event type to event-types.ts for progress tracking.

Fixes #176

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/job-events/event-types.ts

@@ -7,6 +7,7 @@
 export const JOB_CREATED = "job.created";
 export const JOB_QUEUED = "job.queued";
 export const JOB_STARTED = "job.started";
+export const JOB_PROGRESS = "job.progress";
 export const JOB_COMPLETED = "job.completed";
 export const JOB_FAILED = "job.failed";
 export const JOB_CANCELLED = "job.cancelled";
@@ -36,6 +37,7 @@ export const ALL_EVENT_TYPES = [
   JOB_CREATED,
   JOB_QUEUED,
   JOB_STARTED,
+  JOB_PROGRESS,
   JOB_COMPLETED,
   JOB_FAILED,
   JOB_CANCELLED,