fix(build): stamp runtime postbuild artifacts

scripts/runtime-postbuild-stamp.mjs

@@ -0,0 +1,18 @@
+#!/usr/bin/env node
+import process from "node:process";
+import { pathToFileURL } from "node:url";
+import { writeRuntimePostBuildStamp } from "./lib/local-build-metadata.mjs";
+
+export {
+  RUNTIME_POSTBUILD_STAMP_FILE,
+  writeRuntimePostBuildStamp,
+} from "./lib/local-build-metadata.mjs";
+
+if (import.meta.url === pathToFileURL(process.argv[1] ?? "").href) {
+  try {
+    writeRuntimePostBuildStamp();
+  } catch (error) {
+    console.error(error);
+    process.exit(1);
+  }
+}