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。

check-linuxcnc-workstreams-source-map.sh

@@ -121,8 +121,6 @@ for workstream, paths in expected.items():
 for test_entry in ["test-native.sh", "test-linuxcnc-source-link.sh"]:
     text = Path(test_entry).read_text(encoding="utf-8")
     for guard in sorted({path for paths in expected.values() for path in paths if path.startswith("check-")}):
-        if guard in {"check-linuxcnc-wasm-shims-source-map.sh", "check-linuxcnc-wasm-blockers-source-map.sh"}:
-            continue
         if f"./{guard}" not in text:
             raise SystemExit(f"{test_entry} does not run workstream source-map guard: {guard}")
 PY