接入 WASM blocker 自检

结论：native/source-link 必跑入口已执行 blocker 分析器负路径自检，防止坏 manifest、缺失源根、重复条目和缺失替换映射退化。

check-linuxcnc-wasm-blockers-source-map.sh

@@ -180,4 +180,11 @@ for entry in [
     text = Path(entry).read_text(encoding="utf-8")
     if "./check-linuxcnc-wasm-blockers-source-map.sh" not in text:
         raise SystemExit(f"{entry} must run ./check-linuxcnc-wasm-blockers-source-map.sh")
+for entry in [
+    "test-native.sh",
+    "test-linuxcnc-source-link.sh",
+]:
+    text = Path(entry).read_text(encoding="utf-8")
+    if "CNC_SIM_WASM_BLOCKERS_SELF_CHECKS=1" not in text:
+        raise SystemExit(f"{entry} must run wasm blocker analyzer self-checks")
 PY