fix: update zod to 4.x in transcript-server and fix update-lock:docker script

- Update transcript-server to use zod ^4.1.13 for compatibility
- Fix update-lock:docker script to properly clean workspace node_modules
- Regenerate package-lock.json with clean npmjs.org URLs

Author: ochafik

examples/transcript-server/package.json

@@ -26,7 +26,7 @@
     "@modelcontextprotocol/sdk": "^1.24.0",
     "cors": "^2.8.5",
     "express": "^5.1.0",
-    "zod": "^3.23.0"
+    "zod": "^4.1.13"
   },
   "devDependencies": {
     "@types/cors": "^2.8.19",