JD 8R V23 - Mittellicht StaticLight Fix

- cabLights_vis remains the Blender-cut version with both middle reflector meshes removed.
- roofMiddleLeftStatic and roofMiddleRightStatic now use a true GIANTS staticLight material.
- Lua drives lightControl directly (20 / 0) after stock light updates.
- Left middle = Group 2, right middle = Group 1.
- CTRL+B automatic, CTRL+N manual, 400 ms unchanged.

Expected log:
V23.0.0 middle static nodes: left=true right=true
V23.0.0 middle lightControl: left=true right=true
