[Fix-16573][alert] SQL task alert sending failed

[saowu]

Purpose of the pull request

fix #16573

Brief change log

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This pull request is code cleanup without any test coverage.

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This pull request is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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Pull Request Notice

Pull Request Notice

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This pull request has been automatically marked as stale because it has not had recent activity for 120 days. It will be closed in 7 days if no further activity occurs.

[github-actions[bot]]

This pull request has been closed because it has not had recent activity. You could reopen it if you try to continue your work, and anyone who are interested in it are encouraged to continue work on this pull request.