- Replaced `SUPPORTED_LOCALES` with `supported_locales` for naming consistency.
- Applied formatting improvements to multiline statements for better readability.
- Cleaned up redundant comments and streamlined test assertions.
- Introduced `locale` field in user model and schemas with BCP 47 format validation.
- Created Alembic migration to add `locale` column to the `users` table with indexing for better query performance.
- Implemented `get_locale` dependency to detect locale using user preference, `Accept-Language` header, or default to English.
- Added extensive tests for locale validation, dependency logic, and fallback handling.
- Enhanced documentation and comments detailing the locale detection workflow and SUPPORTED_LOCALES configuration.
- 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.
- Refactored all `password reset` and `auth dependency` tests to utilize async patterns for compatibility with async database sessions.
- Enhanced test fixtures with `pytest-asyncio` to support asynchronous database operations.
- Improved user handling with async context management for `test_user` and `async_mock_user`.
- Introduced `await` syntax for route calls, token generation, and database transactions in test cases.
- Introduced `docker-compose.deploy.yml` for deployment scenarios with pre-built Docker images.
- Added `auth_test_utils.py` to simplify authentication testing in FastAPI.
- Implemented `security.py` for token-based operations like file uploads and password resets.
- Created `init_db.py` for database initialization and superuser creation during startup.
- Updated dependencies and tests to support optional authentication in FastAPI.
- Enhanced entrypoint script to handle database initialization.
