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-native.sh

@@ -43,6 +43,8 @@ preflight_cache_dir="$build_dir/preflight-cache"
 ./check-linuxcnc-browser-app-source-map.sh
 ./check-linuxcnc-workstreams-source-map.sh
 ./check-linuxcnc-tooldata-source-map.sh
+./check-linuxcnc-wasm-shims-source-map.sh
+./check-linuxcnc-wasm-blockers-source-map.sh
 ./check-linuxcnc-switchkins-remap-table-cached.sh --cache-dir "$preflight_cache_dir" linuxcnc-kinematics-source-files.txt
 grep -F 'tooldata:src/emc/tooldata/tooldata_nml.cc:NML tool table backend selected by LinuxCNC TOOL_NML_FLAG' linuxcnc-rs274-source-files.txt >/dev/null
 grep -F 'tooldata:src/emc/tooldata/tool_mmap_read.cc:LinuxCNC tooldata mmap reader utility source from tooldata Submakefile' linuxcnc-rs274-source-files.txt >/dev/null