Fix data_sync startup crash by properly invoking async main

[davidlcarrascal]

What problem does this PR solve?

This PR fixes a startup crash in the data_sync_0 service caused by an incorrect asyncio.run call. The main coroutine was being passed as a function reference instead of being invoked, which raised:

ValueError: a coroutine was expected, got <function main ...>

What I changed

• Updated the entrypoint in sync_data_source.py to correctly invoke the coroutine with asyncio.run(main()).

Testing

• No tested.

Related Issue Fixes https://github.com/infiniflow/ragflow/issues/11878

Type of change

• [x] Bug Fix (non-breaking change which fixes an issue)

[KevinHuSh]

Appreciations! Please remove the unnecessary code format alterations.

[davidlcarrascal]

Appreciations! Please remove the unnecessary code format alterations.

Done!