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.

tests/unit/managers/test_ingestor_manager.py

@@ -170,13 +170,6 @@ async def test_shutdown(ingestor_manager):
     ingestor_manager.data_manager.shutdown.assert_called_once()
 
 
-@patch('ingestor.managers.ingestor_manager.asyncio')
-def test___del__(asyncio_mock, ingestor_manager):
-    ingestor_manager.shutdown = MagicMock()
-    ingestor_manager.__del__()
-    asyncio_mock.run.assert_called_once_with(ingestor_manager.shutdown.return_value)
-
-
 @mark.asyncio
 async def test_remove_server(ingestor_manager):
     server1 = AsyncMock()