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.

README.md

@@ -37,4 +37,23 @@ pip install -r requirements.txt
 Run feeder
 '''
 python simulator/redis-feeder.py
+'''
+
+## Unit tests
+### Install pytest
+'''
+pip install pytest
+'''
+### Run pytest
+'''
+pytest
+'''
+### Get current coverage
+'''
+pip install pytest-cov
+pytest --cov=ingestor
+'''
+### Generate complete report
+'''
+pytest --cov=ingestor --cov-report=html
 '''