fix: Update region Version in the worker loop

[evenyag]

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Refer to a related PR or issue link (optional)

• Writing manifest files outside of the write thread #3456

What's changed and what's your intention?

This PR sends a notification to the worker loop after the manifest manager stores the update action. The worker will apply the update to the region Version.

It ensures the version is updated in the worker loop. If we update the version in another thread, then we might not have a consistent view of the version in the worker loop.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

[waynexia]

⚡ blazing cool!

[codecov]

Codecov Report

Attention: Patch coverage is 58.08824% with 57 lines in your changes missing coverage. Please review.

Project coverage is 85.09%. Comparing base (09e0e1b) to head (2e2d3bc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4114      +/-   ##
==========================================
- Coverage   85.40%   85.09%   -0.32%     
==========================================
  Files         994      994              
  Lines      173970   173994      +24     
==========================================
- Hits       148587   148066     -521     
- Misses      25383    25928     +545     

[v0y4g3r]

LGTM, exquisite design!