- Add pyproject.toml with uv and ruff configuration
- Pin Python version to 3.13 via .python-version
- Add Makefile commands: lint, format, fix
- Apply ruff formatting to entire codebase
- Remove unused imports (base64 in yookassa/simple_subscription)
- Update .gitignore for new config files
- Added checks for safe filename to prevent directory traversal attacks.
- Updated file type validation to use the sanitized filename.
- Implemented path resolution to ensure uploaded files are within the backup directory.
