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 <[email protected]>

apps/api/src/coordinator-integration/interfaces/coordinator-job.interface.ts

@@ -0,0 +1,41 @@
+/**
+ * Result of job creation from coordinator
+ */
+export interface CoordinatorJobResult {
+  jobId: string;
+  status: string;
+  queueName: string;
+  estimatedStartTime?: Date;
+}
+
+/**
+ * Health status for coordinator integration
+ */
+export interface CoordinatorHealthStatus {
+  api: boolean;
+  bullmq: {
+    connected: boolean;
+    queues: Record<string, number>;
+  };
+  timestamp: Date;
+}
+
+/**
+ * Quality gate result from coordinator
+ */
+export interface QualityGateResult {
+  lint?: boolean;
+  typecheck?: boolean;
+  test?: boolean;
+  coverage?: boolean;
+  build?: boolean;
+}
+
+/**
+ * Agent assignment info from coordinator
+ */
+export interface AgentAssignment {
+  agentType: string; // 'sonnet', 'opus', 'haiku', 'glm'
+  agentId: string;
+  estimatedContext: number;
+}

apps/api/src/coordinator-integration/interfaces/index.ts

@@ -0,0 +1 @@
+export * from "./coordinator-job.interface";