**Related issue:** Resolves#47343
# 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`.
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
* **New Features**
* Added support for providing an identity provider (IdP) UUID in
enrollment-token requests via an `idp_uuid` query parameter, affecting
both fully-managed and non-fully-managed flows.
* Enrollment OTA now carries the IdP UUID into the enrollment flow and
token request, with server-rendered pages exposing the selected IdP when
applicable.
* **Bug Fixes**
* For fully-managed enrollments, the IdP/SSO cookie is cleared after
successful authentication to avoid stale IdP selection.
* **Tests**
* Extended coverage for `idp_uuid` precedence over the IdP cookie and
for cookie-clearing behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Konstantin Sykulev
8e3f17804e