fix: pin @types/node to existing version and regenerate lockfile

- Fix @types/node 20.19.28 -> 20.19.27 (typo, version didn't exist)
- Regenerate package-lock.json to resolve versions available on both
  public npm and Anthropic artifactory registries

Author: ochafik

package-lock.json

@@ -78,6 +78,7 @@
     "@types/bun": "^1.3.2",
     "@types/react": "^19.2.2",
     "@types/react-dom": "^19.2.2",
+    "@types/node": "20.19.27",
     "caniuse-lite": "1.0.30001763",
     "cheerio": "1.1.2",
     "concurrently": "^9.2.1",