Already there: fx/fy/cx/cy and k1,k2,k3,p1,p2 of both streams, extrinsics
depth->color (rotation row-major, translation mm). Added, as new keys only:
width, height and distortion model name (an rs.distortion member) in "ir"
and "rgb", and depth_scale_m at the top. Docstring states the extrinsics
convention: p_rgb = R p_ir + t, R row-major (the SDK's is column-major).
Same keys in /api/status and /api/open, which share the payload.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>