SIENTIAPDE-1231

Update model retraining and logging enhancements

- Changed the GITHUB_BRANCH value in values.yaml to 'main' for consistency.
- Refactored MLFlow class to improve timestamp handling and error messaging during model retraining.
- Enhanced MLFlowRepository methods to include metadata logging and improved model version retrieval.
- Updated minimal_retrain workflow to support extended timeout for activities and include model configuration in input data.

laborious/worker/worker.py

@@ -142,7 +142,8 @@ async def main():
                 activities.load_custom_query,
                 activities.retrain_model,
                 activities.update_production_model,
-                activities.export_data_to_postgres
+                activities.format_retrain_report,
+                activities.export_data_to_postgres,
             ],
             max_concurrent_workflow_tasks=50,
             max_concurrent_activities=50,