SIENTIAPDE-1312

Refactor error handling in MLFlowRepository and update tests

- Improved error message formatting in MLFlowRepository for better readability.
- Updated test assertions to ensure correct calls to MLflow methods during experiment retrieval and creation.

laborious/utils/repository/model_repository.py

@@ -178,7 +178,9 @@ class MLFlowRepository:
                 experiment_id = mlflow.create_experiment(experiment_name)
                 experiment = mlflow.get_experiment(experiment_id)
                 if experiment is None:
-                    raise ValueError(f'Experiment {experiment_name} not found after creation, unknown reason')
+                    raise ValueError(
+                        f'Experiment {experiment_name} not found after creation, unknown reason'
+                    )
             else:
                 raise ValueError(f'Experiment {experiment_name} not found')