**Related issue:** Resolves#39900
## Testing
- [x] QA'd all new/changed functionality manually
For unreleased bug fixes in a release candidate, one of:
- [x] Confirmed that the fix is not expected to adversely impact load
test results
- [x] Alerted the release DRI if additional load testing is needed
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## Summary by CodeRabbit
* **Bug Fixes**
* Improved timestamp handling for OS vulnerability data synchronization
to use UTC timezone when synchronization is enabled, ensuring consistent
timing behavior across different system configurations.
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Konstantin Sykulev
ba7720f7de