参考所有分组，完成尽量多的内容。禁止顺手扩功能 smoke：接入WASM边界源码映射

结论：将 WASM shims/blockers source-map guard 接入 native/source-link 主检查，并取消 workstreams guard 对这两个六分组 guard 的例外；仅加强源映射边界检查，未新增 CNC 行为，未扩展 smoke fallback。\n\n测试：./check-linuxcnc-workstreams-source-map.sh；./check-linuxcnc-wasm-shims-source-map.sh；./check-linuxcnc-wasm-blockers-source-map.sh；git diff --check；CNC_SIM_ALL_NATIVE_GUARDRAILS_ONLY=1 ./test-all-native.sh；./test-native.sh；./test-linuxcnc-source-link.sh。

test-linuxcnc-source-link.sh

@@ -45,6 +45,8 @@ LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs-cached.sh --cache-dir "$p
 ./check-linuxcnc-browser-app-source-map.sh
 ./check-linuxcnc-workstreams-source-map.sh
 ./check-linuxcnc-tooldata-source-map.sh
+./check-linuxcnc-wasm-shims-source-map.sh
+./check-linuxcnc-wasm-blockers-source-map.sh
 LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-switchkins-remap-table-cached.sh --cache-dir "$preflight_cache_dir" linuxcnc-kinematics-source-files.txt
 # The LinuxCNC source-linked dump path is not concurrency-safe under parallel execution.
 exec 9>"${TMPDIR:-/tmp}/cnc_sim_rs274_source_link.lock"