feat: enhance training model functionality and reporting

- Added `evidently` to requirements for improved model evaluation.
- Introduced `TrainModelResult` class with a `to_dict` method for better result handling.
- Updated `train_model` method to return a comprehensive training result, including run details.
- Enhanced `cleanup_run_directory` method in `DataManagerRepository` for improved resource management.
- Adjusted type hints in `TrainModel` for clarity and consistency.

requirements.txt

@@ -7,3 +7,4 @@ botocore==1.40.55
 git+https://github.com/Aignosi/sientia-dataops-library.git@v1.10.1
 prometheus-client==0.23.1
 beautifulsoup4==4.12.3
+evidently