继续完成 web-rtcp-5axis-sim-plan

结论：完成 LinuxCNC kinematics WASM ABI 覆盖，并将 web-rtcp-5axis-sim-plan 的 RTCP frame/boundary adapter 接到 xyzac-trt kinematics SDK；Node、build、browser smoke 验证通过。

wasm-port/docs/sim-configs-coverage-handoff.md

@@ -44,6 +44,7 @@ The generated artifact baseline is:
 - `build/wasm/sim-configs-inventory/python-remap-boundary-summary.tsv`
 - `build/wasm/sim-configs-inventory/promotion-candidates.tsv`
 - `build/wasm/sim-configs-inventory/remaining-skip-main-program-promotion-audit.tsv`
+- `build/wasm/sim-configs-inventory/remaining-skip-simulation-implementation-coverage.tsv`
 - `build/wasm/sim-configs-inventory/evidence-expansion-candidates.tsv`
 - `build/wasm/sim-configs-inventory/runtime-boundary-promotion-blockers.tsv`
 - `build/wasm/sim-configs-inventory/runtime-boundary-host-readiness-rollup.tsv`
@@ -63,6 +64,14 @@ incomplete user-M process native/inventory promotion proof, even though the
 browser simulation state now includes a source-derived virtual HAL proof for
 the `M429 -> M129` turn and `M428 -> M128` mill state transitions. The TWP
 `incremental_repetition_g533.ngc` row remains preserved upstream demo evidence.
+`remaining-skip-simulation-implementation-coverage.tsv` is the companion
+77-row source-derived implementation ledger for the entire skipped set. It does
+not change baseline status; instead it records how each skipped row is already
+covered in the CNC simulation system: 65 rows are LinuxCNC source assets used
+as remap/subroutine dependencies, 10 rows are non-main macro/load class
+coverage, 1 row is the designed-but-blocked LinuxCNC-owned user-M runtime
+boundary with virtual HAL state proof, and 1 row is a preserved upstream demo
+edge with invalid motion source.
 The 2026-06-20 re-audit confirmed that there are no directly promotable
 remaining skipped main-program rows: