Rust port in nurbs::crv_offset, C++ shim with an exact sample-count guard,
solidcore-ffi binding, difftest runner (55 .smc-derived fixtures + 1500
generated), all 1555 cases green, max_rel_err 0.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V8ohWGLCzFPoZriCeSSero