**Related issue:** Resolves#45149 (adds to)
## 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
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Throttle continuous policy automations to avoid repeated install
attempts within the policy update interval.
* **New Features**
* Install records now include an updated timestamp for accurate cooldown
decisions.
* Added tracking of recently verified VPP app installs to avoid
redundant re-installs.
* **Tests**
* New and updated unit and integration tests covering cooldown behavior
and VPP verification lookups.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Lucas Manuel Rodriguez
339af293be