issue-13281-backend-changes

- Introduced `POST /mdm/profiles` for uploading Windows or macOS custom profiles.
- New endpoints for managing MDM profiles: `DELETE /mdm/profiles/{id}`, `GET /mdm/profiles/{id}`, `GET /mdm/profiles` (paginated list), `GET /mdm/profiles/summary`.
- Updated `GET /api/v1/hosts/:id` to include Windows MDM profiles.
- Fleetctl now supports configuration of Windows MDM profiles.