ifix: Try dedicated ThreadPoolExecutor for query_awaited

[timgl]

Problem

For some reason the query doesn't start in production, but works fine locally. Might be something to do with asgi or whatever. Try this to see if it fixes it

Changes

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Does this work well for both Cloud and self-hosted?

How did you test this code?

[greptile-apps]

PR Summary

Added a dedicated ThreadPoolExecutor for query processing in the query_awaited function to address production issues where queries weren't starting.

• Created global QUERY_EXECUTOR with 50 max workers to handle concurrent query processing
• Replaced asyncio.get_event_loop() with asyncio.get_running_loop() for better async context handling
• Modified query_awaited to use the dedicated executor instead of the default one
• Set thread naming prefix as "query_processor" for better debugging and monitoring
• Added comment explaining the worker limit to ensure system isn't overwhelmed while allowing 200 simultaneous queries

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[aspicer]

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