feat(worker-manager): implement Redis connection pooling for sync workers

- Add Redis ConnectionPool with max_connections=15 for improved resource management
- Enable socket keepalive to maintain persistent connections
- Set socket_connect_timeout to 5 seconds for faster failure detection
- Enable retry_on_timeout for automatic reconnection on timeout events
- Add health_check_interval=30 for periodic connection validation
- Update logging to reflect connection pool configuration
- Improves connection stability and resource efficiency for sync worker operations

app/sync/worker_manager.py

@@ -42,17 +42,23 @@ class WorkerManager:
             await conn.execute(text("SELECT 1"))
         logger.info("✅ Connected to PostgreSQL")
         
-        # Redis
+        # Redis with connection pooling
         logger.info(f"Connecting to Redis: {settings.REDIS_HOST}:{settings.REDIS_PORT}")
-        self.redis_client = redis.Redis(
+        pool = redis.ConnectionPool(
             host=settings.REDIS_HOST,
             port=settings.REDIS_PORT,
             password=settings.REDIS_PASSWORD,
             db=settings.REDIS_DB,
-            decode_responses=True
+            decode_responses=True,
+            max_connections=15,  # Slightly higher for sync workers
+            socket_keepalive=True,
+            socket_connect_timeout=5,
+            retry_on_timeout=True,
+            health_check_interval=30
         )
+        self.redis_client = redis.Redis(connection_pool=pool)
         await self.redis_client.ping()
-        logger.info("✅ Connected to Redis")
+        logger.info("✅ Connected to Redis with connection pool (max_connections=15)")
         
         # Initialize sync services
         await self._initialize_sync_services()