- Introduced `DependenciesMiddleware` and `BlacklistMiddleware` for enhanced request handling across all routers.
- Refactored admin handlers to utilize new middleware, improving access control and error handling.
- Updated the `admin_router` to include middleware for access checks and streamlined the process of banning users.
- Enhanced the structure of admin handler imports for better organization and maintainability.
- Improved error handling in various admin functions to ensure robust user interactions.
- Introduced a new `PrivateHandlers` class to encapsulate private message handling logic, improving organization and maintainability.
- Added new dependencies in `requirements.txt` for database support with `aiosqlite`.
- Updated the private handlers to utilize modular components for better separation of concerns and easier testing.
- Implemented error handling and logging for improved robustness in message processing.
