fix(ingestor): Remove __del__ methods for async shutdown

ingestor/managers/ingestor_manager.py

@@ -1,4 +1,3 @@
-import asyncio
 import traceback
 from copy import deepcopy
 
@@ -188,9 +187,6 @@ class IngestorManager(SientiaMonitoring):
             await server.shutdown()
         self.data_manager.shutdown()
 
-    def __del__(self):
-        asyncio.run(self.shutdown())
-
     async def remove_server(self, server: str):
         """
         Removes an OPC server from the ingestor.

ingestor/managers/opc_manager.py

@@ -112,9 +112,6 @@ class OpcManager(SientiaMonitoring):
             f'nodes={self.nodes}, subscriptions={self.subscriptions}'
         )
 
-    def __del__(self):
-        asyncio.run(self.shutdown())
-
     async def shutdown(self):
         """
         Comprehensive cleanup method for graceful shutdown.