chore: import upstream snapshot with attribution

scripts/benchmark/rebuild.ts

@@ -0,0 +1,17 @@
+#!/usr/bin/env bun
+/**
+ * Fast rebuild: reuse existing VM, just transfer source and recompile.
+ * Usage: bun run scripts/benchmark/rebuild.ts
+ */
+
+import { vmEnsureReady, vmBuildRtk } from "./lib/vm";
+
+const PROJECT_ROOT = new URL("../../", import.meta.url).pathname.replace(/\/$/, "");
+
+await vmEnsureReady();
+const info = await vmBuildRtk(PROJECT_ROOT);
+
+console.log(`\nRebuild complete:`);
+console.log(`  Version: ${info.version}`);
+console.log(`  Binary:  ${info.binarySize} bytes`);
+console.log(`  Time:    ${info.buildTime}s`);