<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#42545
This rework does not significantly improve the worst case performance,
but it does improve some cases (like lower number of hosts with a lot of
profiles).
# 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] 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
* **Performance Improvements**
* Improved batch deletion for Windows MDM configuration profiles to
handle very large-scale cleanup with fewer database updates.
* Replaced per-profile update loops with multi-profile batched updates
to reduce update overhead and improve determinism.
* **Tests**
* Added tests validating multi-profile batch delete behavior and
ensuring each queued delete command is correctly targeted.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
