Replace deprecated asyncio.get_event_loop() with asyncio.run()

[na1oh]

Description

The asyncio.get_event_loop() method is deprecated since Python 3.10.
Using asyncio.run() is the modern and recommended way to run async code.

Changes

• Replaced asyncio.get_event_loop().run_until_complete(main()) with asyncio.run(main())
• Added if __name__ == '__main__': guard for better module import safety

Benefits

• Automatically handles event loop creation and cleanup
• Provides better compatibility with modern Python versions
• Fixes potential DeprecationWarning
• Follows Python best practices

Checklist

• Code follows project style
• Tested locally (code is functionally equivalent)
• Commit message is clear
• PR description is detailed