SIENTIAPDE-988

Refactor OpcManager initialization and unsubscribe method; enhance logging

- Removed the `initialize_from_config` method from `OpcManager` class and adjusted the constructor to handle configuration directly.
- Improved the `unsubscribe` method to include detailed logging for non-existent subscriptions.
- Updated tests in `test_opc_manager.py` to reflect changes in the `OpcManager` class.
- Commented out Docker-related fixtures in `conftest.py` for potential future use.
- Enhanced test coverage in `test_single_node.py` and `test_data_manager.py` with additional scenarios and assertions.
- Introduced new methods in `Ingestor` and `IngestorManager` classes to manage server subscriptions and leases more effectively.
- Added new tests for `Ingestor` class to validate initialization and slot management logic.
- Implemented logging improvements across various classes to ensure better traceability of actions and errors.

tests/unit/managers/test_resource_manager.py

@@ -80,3 +80,21 @@ def test_drop_tag_lease(resource_manager):
     resource_manager.redis.delete.assert_called_once_with(
         'lease:opc_tags:tag_id'
     )
+
+
+def test_get_all_ingestors(resource_manager):
+    resource_manager.redis.keys.return_value = ['ingestor1', 'ingestor2']
+    result = resource_manager.get_all_ingestors()
+    assert result == ['ingestor1', 'ingestor2']
+    resource_manager.redis.keys.assert_called_once_with(
+        'heartbeat:ingestor:*'
+    )
+
+
+def test_get_all_slots(resource_manager):
+    resource_manager.redis.keys.return_value = ['slot1', 'slot2']
+    result = resource_manager.get_all_slots()
+    assert result == ['slot1', 'slot2']
+    resource_manager.redis.keys.assert_called_once_with(
+        'slot:opc_tags:*'
+    )