SIENTIAPDE-1171

Refactor model_repository and enhance test coverage for MLFlow functionalities

- Updated model_repository to ensure the 'temp' directory is created if it doesn't exist using `exist_ok=True`.
- Added new tests for retraining and updating production models, including error handling scenarios.
- Improved existing tests for model management workflows to ensure robustness and reliability.

laborious/utils/repository/model_repository.py

@@ -168,8 +168,7 @@ class MLFlowRepository():
             # dynamic parameters, including model itself
             mlflow.sklearn.log_model(data_model, "data_model")
 
-            if not path.exists("temp"):
-                makedirs("temp")
+            makedirs("temp", exist_ok=True)
 
             file_path = f"temp/raw_data_{model_name}.csv"
             data.to_csv(file_path, index=True)