解锁L4-TOOL-DB主机运行环境

结论：已识别RIP版LinuxCNC主机运行时，Tool DB native protocol probe可通过，inventory baseline保持28/28/131/0且promotion继续锁定。

wasm-port/tests/native/probe_python_remap_runtime.sh

@@ -14,7 +14,19 @@ required_commands=(python3 linuxcnc)
 missing_requirements=()
 
 command_path() {
-  command -v "$1" 2>/dev/null || true
+  local command_name="$1"
+  local path
+  path="$(command -v "$command_name" 2>/dev/null || true)"
+  if [[ -n "$path" ]]; then
+    printf '%s\n' "$path"
+    return
+  fi
+
+  case "$command_name" in
+    linuxcnc)
+      [[ -x "$LINUXCNC_ROOT/scripts/linuxcnc" ]] && printf '%s\n' "$LINUXCNC_ROOT/scripts/linuxcnc"
+      ;;
+  esac
 }
 
 csv_join() {