- Add Priority enum (low, medium, high) to Todo model with default medium
- Create migration to add priority field to existing todos table
- Enhance pagination with proper metadata (page, total, has_next, has_prev)
- Add search functionality across title and description fields
- Add filtering by completion status and priority level
- Update API endpoints with query parameters for filtering and search
- Add TodoListResponse schema for structured pagination response
- Format code with Ruff
