chore: update @types/node 20→25

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: yamatatsu

package.json

@@ -48,7 +48,7 @@
   },
   "devDependencies": {
     "@aws-sdk/client-athena": "^3.540.0",
-    "@types/node": "^20.12.2",
+    "@types/node": "^25.5.0",
     "aws-sdk-client-mock": "^4.0.0",
     "concurrently": "^9.2.1",
     "husky": "^9.0.11",