- Introduced `pyproject.toml` to centralize backend tool configurations (e.g., Ruff, mypy, coverage, pytest).
- Replaced Black, isort, and Flake8 with Ruff for linting, formatting, and import sorting.
- Updated `requirements.txt` to include Ruff and remove replaced tools.
- Added `Makefile` to streamline development workflows with commands for linting, formatting, type-checking, testing, and cleanup.
- Added explicit Pydantic validation to reject modifications to `is_superuser` in `UserUpdate` schema.
- Updated backend logic in `users.py` to support defense-in-depth against privilege escalation.
- Introduced comprehensive tests for `/users` and `/users/me` endpoints to ensure `is_superuser` validation works correctly.
- Enhanced error handling and validation messages for better clarity and robustness.
- Introduced comprehensive test coverage for user-related API endpoints (`/users`, `/users/me`), including edge cases and error scenarios.
- Added success and error path tests for admin routes, including user management (CRUD operations, bulk actions) and organization management.
- Enhanced test reliability through improved exception handling and validation.
- Included test-specific scenarios for handling unexpected errors and reporting gaps in coverage with actionable recommendations.
- Added detailed coverage report to track progress and identify improvement areas.
- Introduced unit tests for `/users` and `/users/me` routes, covering listing, filtering, fetching, updating, and access control scenarios.
- Added tests for user password change functionality, including validation and success paths.
- Enhanced coverage for superuser-specific and user-specific operations, error handling, and edge cases.
