按建议，继续工作

结论：已新增 cutter compensation 平面切换拒绝 fixture，固定 vendored LinuxCNC convert_cutter_compensation_on() 与 convert_set_plane() 的错误路径；native probe 全量验证通过。

wasm-port/docs/drift-report.md

@@ -55,6 +55,9 @@ semantic rewrites:
 - Full machine baselines beyond the current identity/trivial, `5axiskins`,
   TRT, delta, SCARA, PUMA, serial `genserkins`, hexapod `genhexkins`,
   pentapod `pentakins`, and other existing runtime probes are not established.
+- Positive cutter-compensated motion is not yet a standalone runtime baseline;
+  current cutter compensation coverage is limited to vendored interpreter
+  rejection paths.
 - Fixture expectations are currently checked against the standalone vendored
   source path, not by running a native LinuxCNC binary for every fixture.