chore: update n8n to v1.102.4

- Updated n8n from 1.101.1 to 1.102.4
- Updated n8n-core from 1.100.0 to 1.101.2
- Updated n8n-workflow from 1.98.0 to 1.99.1
- Updated @n8n/n8n-nodes-langchain from 1.100.1 to 1.101.2
- Rebuilt node database with 531 nodes
- All validation tests passing

🤖 Generated with [Claude Code](https://claude.ai/code)

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

package.json

@@ -95,14 +95,14 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.13.2",
-    "@n8n/n8n-nodes-langchain": "^1.100.1",
+    "@n8n/n8n-nodes-langchain": "^1.101.2",
     "axios": "^1.10.0",
     "better-sqlite3": "^11.10.0",
     "dotenv": "^16.5.0",
     "express": "^5.1.0",
-    "n8n": "^1.101.1",
-    "n8n-core": "^1.100.0",
-    "n8n-workflow": "^1.98.0",
+    "n8n": "^1.102.4",
+    "n8n-core": "^1.101.2",
+    "n8n-workflow": "^1.99.1",
     "sql.js": "^1.13.0",
     "uuid": "^10.0.0"
   },