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**Related issue:** Resolves#28091
# Checklist for submitter
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
## Testing
- [x] Added/updated automated tests
- [x] Where appropriate, [automated tests simulate multiple hosts and
test for host
isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing)
(updates to one hosts's records do not affect another)
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
## Bug Fixes
* Fixed an issue where vulnerability counts would inflate over time due
to orphaned vulnerability entries remaining after hosts are removed.
Vulnerability cleanup now automatically runs during routine scanning
operations.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Victor Lyuboslavsky
5c893a7b8e