OC250 / Revision E / Representative compute mounting joint

This public demonstration includes only the compute_joint scene: an explicit
Boolean CAD section through a compute package and panel coupon. Other scenes
from the original engineering package are not included or loaded.

The retained mesh positions, normals, triangle indices, part transforms and
metadata are unchanged. Only scene asset indices are remapped into the local
subset. The existing bundled renderer is copied without recompilation.
The downloadable compute_joint GLB is byte-for-byte the original Rev E file.

PRELIMINARY GEOMETRIC STUDY. NOT FLIGHT-QUALIFIED.
Not a manufacturing release, a validated spacecraft or a tested prototype.
No structural, thermal, deployment or environmental qualification is implied.
Generic equipment envelopes remain unselected design allocations.
See ENGINEERING_BOUNDARY.md and the individual model-status fields.

Three.js and OrbitControls are included in the existing engine. Their MIT
licence remains in THREE_LICENSE.txt and the bundled licence notice.