按建议，继续完成后续工作

结论：state_tag_motion 已补充 LinuxCNC motion 事件并纳入 upstream rs274 side-by-side baseline，UPDATE_TAG 仍由 standalone native harness 验证，完整 native probes 验证通过。

wasm-port/docs/drift-report.md

@@ -69,11 +69,12 @@ semantic rewrites:
   path. The upstream `rs274` side-by-side baseline now covers simple motion,
   arc geometry, offsets, feed-control, comment/logging, numbered-parameter,
   probing, spindle-orient, file-open reset, file-finish, tool-reload, and
-  canned-cycle and O-word subroutine fixtures; it also covers threading/rigid
-  tap, NURBS dispatch boundaries, and comparable canonical runtime edge and
-  program-end cleanup calls. Adapter-heavy fixtures, standalone modal-state
-  assertions, and upstream `rs274` output gaps such as `WAIT` or hidden NURBS
-  control-point detail still need dedicated native LinuxCNC baselines.
+  canned-cycle, state-tag motion, and O-word subroutine fixtures; it also
+  covers threading/rigid tap, NURBS dispatch boundaries, and comparable
+  canonical runtime edge and program-end cleanup calls. Adapter-heavy fixtures,
+  standalone modal-state assertions, and upstream `rs274` output gaps such as
+  `WAIT` or hidden NURBS control-point detail still need dedicated native
+  LinuxCNC baselines.
 - `canned_cycles` is now in the upstream `rs274` side-by-side baseline after
   the minimal interpreter harness was aligned with LinuxCNC `Interp::init()`
   default `G73/G83` peck-clearance values for millimeter units.