BREAKING FIX: DeviceProfile is sent FROM client TO server in request body,
not returned in response. This was the bug preventing the filter from working.
Changes:
- Filter DeviceProfile in POST request body before sending to Jellyfin
- Add extensive debug logging to track filtering process
- Remove unnecessary response filtering (DeviceProfile not in response)
- Simplify response handling (always stream)
Now logs:
- 'Xbox PlaybackInfo request detected' when Xbox client detected
- 'Filtering Xbox DeviceProfile in REQUEST' when filtering
- 'No DeviceProfile found' if profile missing (debug info)
c9ffefed70