Fusion - the Fusion 360 Bridge

Fusion's mechanical transport needs a typed way to inspect render settings and prepare a camera without moving the viewport. This adds render_scene_inspect, requiring the current session and exact document/revision, with bounded scene/environment observations and independently verified orthographic or perspective camera descriptors.

This follows mechanical foundation PR #11. The branch starts at its exact commit 89ba635b002093eb5eabfeb01cd9e262a048ad76; merge #11 first. The focused feature delta is 26 files, with 55 typed operations and 179 public verbs. Foundation source and upstream release numbers remain unchanged. The attached feature patch isolates this delta while the foundation is pending.

The native test exposed Autodesk FUS-263280: a newly created Camera retains correct values while reporting isValid=false. The implementation checks the exact detached Camera wrapper and every requested geometry/lens value, retains the false native flags, and leaves other object-validity guards intact. Current viewport-camera observation can still be partial.

Validation: 479 Python tests, 24 focused render tests, nine runner boundary tests and nine independent reviewer cases pass. Static checks pass; a fresh Windows build embeds the candidate contract. Exact source executed on Fusion 2705.1.30 passed current-scene, orthographic and perspective cases plus all 13 native fixture/restoration checks. Original failed evidence, the separate diagnostic and final acceptance are retained in docs/render-scene-evidence-2026-10-06.

Native qualification covers the module function in the existing pinned runtime; installed public routing remains untested. No rendering jobs, pixel-output, full scene witness, native storyboard or video support is claimed. No captures or Shotlog uploads occurred, and no installed runtime or production release was changed.