feat: enhance test scenarios and configuration for regression models

- Updated `pyproject.toml` to include new linting rules for end-to-end tests.
- Modified `requirements-dev.txt` to add dependencies for E2E testing with `testcontainers` and `requests`.
- Refactored multiple JSON test scenario files to standardize structure, including new fields for `experiment_run_id`, `bucket_name`, and `file_name`.
- Improved model training parameters in `train_model_params.py` to use `experiment_name` directly.
- Adjusted `data_manager_repository.py` to utilize the updated `experiment_name` for logging.

These changes improve the organization and clarity of regression model tests and enhance the overall testing framework.

requirements-dev.txt

@@ -10,9 +10,11 @@ pandas-stubs>=2.0.0      # Type stubs for pandas
 types-requests>=2.31.0   # Type stubs for requests
 
 # Testing
-pytest>=7.4.0            # Testing framework
-pytest-cov>=4.1.0        # Coverage plugin for pytest
-pytest-asyncio>=0.21.0   # Async test support (already in main requirements)
+pytest>=7.4.0                       # Testing framework
+pytest-cov>=4.1.0                   # Coverage plugin for pytest
+pytest-asyncio>=0.21.0              # Async test support
+testcontainers[postgres,minio,mongodb]>=4.0.0  # Real containers for E2E tests
+requests>=2.31.0                    # HTTP client for Gitea REST API seeding (E2E)
 
 # Development Tools
 ipython>=8.12.0          # Enhanced Python shell