feat: Phase 2 — missed call queue ingestion, auto-assignment, endpoints

- MissedQueueService: polls Ozonetel abandonCalls every 30s, dedup by phone
- Auto-assigns oldest PENDING_CALLBACK call on agent Ready (dispose + state change)
- GET /api/worklist/missed-queue, PATCH /api/worklist/missed-queue/:id/status
- Worklist query updated with callback fields and FIFO ordering
- PlatformGraphqlService.query() made public for server-to-server ops
- forwardRef circular dependency resolution between WorklistModule and OzonetelAgentModule

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/platform/platform-graphql.service.ts

@@ -14,7 +14,7 @@ export class PlatformGraphqlService {
     }
 
     // Server-to-server query using API key
-    private async query<T>(query: string, variables?: Record<string, any>): Promise<T> {
+    async query<T>(query: string, variables?: Record<string, any>): Promise<T> {
         return this.queryWithAuth<T>(query, variables, `Bearer ${this.apiKey}`);
     }