SHiRE ScanForge Kinect backend control bridge

Installed:
- Native libfreenect RGB and depth bridge.
- Single supervised Kinect preview owner.
- RGB BMP preview endpoint.
- Depth-colour BMP preview endpoint.
- Motor tilt-up command.
- Motor tilt-down command.
- Motor centre command.
- Kinect LED controls.
- Camera stop command.
- Emergency-release command.
- Automatic centre and LED-off during service shutdown.
- Authenticated ScanForge control actions.

Authentication:
- Header: X-SHiRE-Workspace-Token
- Token source: running ScanForge workspace process
- Token value was never written to evidence or terminal output.

Verified:
- RGB frame produced and validated.
- Depth frame produced and validated.
- Tilt-up command completed.
- Tilt-down command completed.
- Centre command completed.
- Green, yellow and off LED commands completed.
- Camera stopped cleanly.
- Camera and motor USB nodes were released.
- ScanForge workspace remained healthy.
- CoverCanvas and LimbForge remained healthy.
- Sentinel remained unchanged.

Safety preserved:
- Audio capture disabled.
- Calibration remains unverified.
- readyForCapture remains false.
- Real scan capture remains locked.
- Frontend source was not modified.
- Existing staged LiveCapture repair was not modified.
- Forge permissions were not changed.
- Academy was not modified.
- Sentinel was not modified.

Evidence:
/SHiREVault/Backup/OSBackups/SHIRE-SCANFORGE-KINECT-BACKEND-20260806T100815Z