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**Related issue:** Resolves#35044
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
## Testing
- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Bug Fixes**
* Prevented parallel execution of vulnerability jobs when one job runs
longer than two hours, improving job reliability and preventing
concurrent conflicts.
* **Chores**
* Enhanced cron job lock management to better handle long-running
scheduled tasks and prevent premature expiration.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Victor Lyuboslavsky
ea92615507