SIENTIAPDE-1231

Refactor tests and update model_repository.py for clarity and consistency

- Added a blank line in model_repository.py for improved readability.
- Adjusted formatting in test_mlflow.py to streamline assertions.
- Updated ensure_bucket_exists method tests in test_minio_repository.py to reflect the new return value of None instead of True.

laborious/utils/repository/model_repository.py

@@ -35,6 +35,7 @@ PREDICTION_COMPRESSED_PATH = 'artifacts/stacking_model.pkl'
 
 INVALID_FLAVOR_MESSAGE = "Invalid flavor. Use 'sklearn' or 'pyfunc' or 'pytorch'."
 
+
 def force_memory_release(logger: Logger):
     gc.collect()
 
@@ -629,7 +630,7 @@ class MLFlowRepository:
             # Aligns data with treated data indexes to get target variable
             aligned_data = data.loc[treated_data.index]
             aligned_series = aligned_data[target_name]
-            retrain_dataset = pd.merge( # NOSONAR
+            retrain_dataset = pd.merge(  # NOSONAR
                 treated_data, aligned_series, left_index=True, right_index=True
             )
         else: