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/app.module.ts

@@ -27,6 +27,7 @@ import { TelemetryModule, TelemetryInterceptor } from "./telemetry";
 import { RunnerJobsModule } from "./runner-jobs/runner-jobs.module";
 import { JobEventsModule } from "./job-events/job-events.module";
 import { JobStepsModule } from "./job-steps/job-steps.module";
+import { CoordinatorIntegrationModule } from "./coordinator-integration/coordinator-integration.module";
 
 @Module({
   imports: [
@@ -55,6 +56,7 @@ import { JobStepsModule } from "./job-steps/job-steps.module";
     RunnerJobsModule,
     JobEventsModule,
     JobStepsModule,
+    CoordinatorIntegrationModule,
   ],
   controllers: [AppController],
   providers: [