- Create User model and database schema
- Add JWT authentication with secure password hashing
- Create authentication endpoints for registration and login
- Update invoice routes to require authentication
- Ensure users can only access their own invoices
- Update documentation in README.md
- Implement date range filtering for creation and due dates
- Add customer name and email search with case-insensitive partial matching
- Support amount range filtering with min and max values
- Enhance sorting with multiple field options
- Update README with comprehensive documentation for all filter options
- Create FastAPI app structure
- Set up SQLAlchemy with SQLite for database management
- Implement invoice and invoice item models
- Add Alembic for database migrations
- Create invoice generation and retrieval API endpoints
- Add health check endpoint
- Set up Ruff for linting
- Update README with project details
