**Related issue:** Resolves#49495
Redirects queued Fleet-maintained app installs to the newly-active
installer (canceling already-dispatched ones) atomically when an
auto-update or pin change flips the active version, and re-resolves
install retries to the active installer, so a host no longer installs a
superseded cached version.
# Checklist for submitter
- [x] Changes file added for user-visible changes in `changes/`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.
## 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**
* Fleet-maintained app installs now consistently use the currently
active version after automatic promotions, preventing stale installer
targeting.
* Queued installs tied to an older promoted installer are redirected to
the newly active installer instead of being canceled.
* Install retry flows now re-resolve to the active installer at retry
time, avoiding stale retries after version changes.
* **Tests**
* Added datastore coverage for active-installer redirection and updated
retry tests to verify the correct installer ID is used.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Carlo
7cb2399700