Update dependency @langchain/community to v1 [SECURITY]

Author: renovate[bot]

frontend/internal-packages/agent/package.json

@@ -8,7 +8,7 @@
     "./client": "./src/client.ts"
   },
   "dependencies": {
-    "@langchain/community": "0.3.57",
+    "@langchain/community": "1.1.18",
     "@langchain/core": "0.3.78",
     "@langchain/langgraph": "0.4.9",
     "@langchain/langgraph-checkpoint": "0.1.1",