merge: wave 2 executor (01-02) into main

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

paperclip-reference/server/src/version.ts

@@ -0,0 +1,10 @@
+import { createRequire } from "node:module";
+
+type PackageJson = {
+  version?: string;
+};
+
+const require = createRequire(import.meta.url);
+const pkg = require("../package.json") as PackageJson;
+
+export const serverVersion = pkg.version ?? "0.0.0";