SIENTIAPDE-1205

Update values.yaml and refactor shutdown methods for improved configuration and async handling

- Changed replica count from 2 to 1 in values.yaml for deployment optimization.
- Updated image tag from 0.4.3 to 0.4.5 in values.yaml for version consistency.
- Refactored shutdown method in IngestorManager to use await server.shutdown() for better async operation.
- Removed __del__ method in OpcManager to prevent blocking during cleanup.

ingestor/managers/opc_manager.py

@@ -51,9 +51,6 @@ class OpcManager(BaseActivity):
         except Exception as e:
             self.logger.error(f"Error during cleanup: {e}")
 
-    def __del__(self):
-        asyncio.run(self.shutdown())
-
     async def set_security(self):
         """
         Configures the security settings for the OPC UA client.