chore: update n8n to v1.103.2

- Updated n8n from 1.102.4 to 1.103.2
- Updated n8n-core from 1.101.2 to 1.102.1
- Updated n8n-workflow from 1.99.1 to 1.100.0
- Updated @n8n/n8n-nodes-langchain from 1.101.2 to 1.102.1
- Rebuilt node database with 532 nodes
- Bumped version to 2.7.21
- All validation tests passing

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

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.7.20",
+  "version": "2.7.21",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "bin": {
@@ -95,14 +95,14 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.13.2",
-    "@n8n/n8n-nodes-langchain": "^1.101.2",
+    "@n8n/n8n-nodes-langchain": "^1.102.1",
     "axios": "^1.10.0",
     "better-sqlite3": "^11.10.0",
     "dotenv": "^16.5.0",
     "express": "^5.1.0",
-    "n8n": "^1.102.4",
-    "n8n-core": "^1.101.2",
-    "n8n-workflow": "^1.99.1",
+    "n8n": "^1.103.2",
+    "n8n-core": "^1.102.1",
+    "n8n-workflow": "^1.100.0",
     "sql.js": "^1.13.0",
     "uuid": "^10.0.0"
   },