forked from 1b-agent/opencadstudio-upstream
- mass_properties: query path now uses fine mesh_body(0.1, 1e-4) for near-analytic volume/centroid; the render-mesh metrics cache (coarse display LOD) no longer shadows query accuracy. Memoized per (handle, epoch); cold-tess budget kept. - IMPLEMENTATION.md: accuracy item done. - Test accurate_volume_centroid_sphere_and_cube (sphere within 0.5% of 4/3*pi*r^3, centroid at centre, cube exact) -> 617 host lib green.