- 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.
- **Schemas:** Introduce unit tests for `OrganizationBase`, `OrganizationCreate`, and `OrganizationUpdate` schemas. Validate edge cases for slug and name validation.
- **Validators:** Add tests for `validate_password_strength`, `validate_phone_number`, `validate_email_format`, and `validate_slug`. Cover edge cases, boundary conditions, and defensive code paths.
- **Exception Handlers:** Ensure proper error handling in organization, user, and session CRUD operations. Mock database errors and validate exception responses.
- Include test cases to verify robust behavior, normalization, and failure scenarios across schema and validation logic.
- Introduced new unit tests for session CRUD operations, including `update_refresh_token`, `cleanup_expired`, and multi-user session handling.
- Added comprehensive tests for `CRUDBase` methods, covering edge cases, error handling, and UUID validation.
- Reduced default test session creation from 5 to 2 for performance optimization.
- Enhanced pagination, filtering, and sorting validations in `get_multi_with_total`.
- Improved error handling with descriptive assertions for database exceptions.
- Introduced tests for eager-loaded relationships in user sessions for comprehensive coverage.
- Added `init_db.py` to handle async database initialization with the creation of the first superuser if configured.
- Introduced comprehensive tests for session management APIs, including session listing, revocation, and cleanup.
- Enhanced CRUD session logic with UUID utilities and improved error handling.
