feat: Create Favorite model and repository for managing user favorites in the database
feat: Add FavoriteService to handle business logic for favorites management
feat: Enhance Playlist and Sound response schemas to include favorite indicators and counts
refactor: Update API routes to include favorites functionality in playlists and sounds
- Implement comprehensive tests for SoundRepository covering CRUD operations and search functionalities.
- Create tests for UserOauthRepository to validate OAuth record management.
- Develop tests for CreditService to ensure proper credit management, including validation, deduction, and addition of credits.
- Add tests for credit-related decorators to verify correct behavior in credit management scenarios.
- Created a new test package for services and added tests for AuthService.
- Implemented tests for user registration, login, and token creation.
- Added a new test package for utilities and included tests for password and JWT utilities.
- Updated `uv.lock` to include new dependencies: bcrypt, email-validator, pyjwt, and pytest-asyncio.
- Implement initial data seeding for plans in the database.
- Create a new `seed_all_data` function to manage seeding process.
- Update `Sound` and `User` models to include relationships for `SoundPlayed` and `Stream`.
