fix: add thread create debug log

[dapan1121]

Description

Please briefly describe the code changes in this pull request.

Checklist

Please check the items in the checklist if applicable.

• Is the user manual updated?
• Are the test cases passed and automated?
• Is there no significant decrease in test coverage?

[gemini-code-assist]

Summary of Changes

Hello @dapan1121, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the debugging capabilities by providing more descriptive error messages during thread creation failures. Instead of a silent error code assignment, a detailed log message is now emitted, which will significantly aid in diagnosing issues related to thread management and resource allocation.

Highlights

• Improved Error Logging: Replaced a generic TSDB_CODE_OUT_OF_MEMORY error assignment with a detailed debug log message when taosThreadCreate fails. The new log message includes the specific error code returned by tstrerror(terrno).

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[gemini-code-assist]

Code Review

This pull request improves error handling by adding a log message when thread creation fails in tQueryAutoQWorkerAddWorker. This is a useful change. I've identified a potential issue where the logging function could inadvertently alter the terrno value, which could lead to returning an incorrect error code. My review includes a suggestion to make this error handling more robust by preserving the original error code.