fix(api): serialize startup bootstrap ddl

apps/api/src/workers/signal_worker.py

@@ -33,7 +33,7 @@ from typing import Any
 
 import structlog
 
-from src.core.redis_client import get_redis, get_worker_redis
+from src.core.redis_client import get_redis, get_worker_redis, init_worker_redis_pool
 from src.core.telemetry import restore_trace_context
 from src.services.incident_engine import get_incident_engine
 
@@ -131,6 +131,7 @@ class SignalWorker:
             return
 
         await self._ensure_consumer_group()
+        await init_worker_redis_pool()
 
         self._running = True
         self._task = asyncio.create_task(self._consume_loop())