Refactor Ingestor and OPC Manager for Asynchronous Operations
- Updated main function to be asynchronous and integrated asyncio for better concurrency.
- Refactored Ingestor methods to support async operations, including prepare_ingestor, loop, and shutdown.
- Enhanced IngestorManager and OpcManager with async methods for improved performance and responsiveness.
- Replaced blocking calls with await statements to ensure non-blocking behavior during operations.
- Added a new run_async_main function to handle the async event loop setup.
