* fix: improve Telegram bot handling for concurrent starts and graceful shutdown
- Added logic to stop any existing long-polling loop when Start is called again.
- Introduced a mutex to manage access to shared state variables, ensuring thread safety.
- Updated the OnReceive method to prevent multiple concurrent executions.
- Enhanced Stop method to ensure proper cleanup of resources and state management.
* fix: enhance Telegram bot's long-polling management
- Improved handling of concurrent starts by stopping existing long-polling loops.
- Implemented mutex for thread-safe access to shared state variables.
- Updated OnReceive method to prevent multiple executions.
- Enhanced Stop method for better resource cleanup and state management.
* .
278aa1c85c