SIENTIAPDE-1325

Update logging in MLFlowRepository and OpcRepository to use unified logging methods

- Refactored logging calls in MLFlowRepository to replace `self.logger.info` and `self.logger.debug` with `self.info` and `self.debug` for consistency.
- Updated connection logging in OpcRepository to format the connection message properly.
- Adjusted test cases to reflect changes in logging behavior and ensure proper assertions.

tests/laborious/activities/test_mlflow.py

@@ -255,9 +255,7 @@ async def test_retrain_model_success_data_success_retrain(mock_to_datetime, mlfl
     timestamp = raw_data.__getitem__.return_value.max.return_value
 
     raw_data.sort_values.assert_not_called()
-    raw_data.drop_duplicates.assert_called_once_with(
-        subset=['variable', 'timestamp'], keep='first'
-    )
+    raw_data.drop_duplicates.assert_called_once_with(subset=['variable', 'timestamp'], keep='first')
     raw_data = raw_data.drop_duplicates.return_value
 
     raw_data.drop.assert_has_calls(