<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#37271
# Details
This PR addresses a gap where Windows or Linux hosts enrolling via
end-user authentication were not linked to existing SCIM user data.
# 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.
- [X] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)
## Testing
- [x] Added/updated automated tests
- [X] QA'd all new/changed functionality manually
Tested on a Linux VM using Okta, verified that after enrolling it
populated SCIM attributes for the user:
<img width="858" height="299" alt="image"
src="https://github.com/user-attachments/assets/dc3bf70e-62cb-40a6-aebe-fef3db6d8f53"
/>
---------
Co-authored-by: Lucas Manuel Rodriguez <lucas@fleetdm.com>
