docs: update documentation for v2.3.3 release

- Updated CLAUDE.md with v2.3.3 achievements and metrics
- Updated README.md with new node counts and v2.3.3 features
- Added comprehensive CHANGELOG.md entry for v2.3.3
- Bumped version in package.json to 2.3.3

Key updates:
- Documented automated dependency update system
- Updated metrics: 525 nodes, 263 AI tools, 99% property coverage
- Noted successful update to n8n v1.97.1
- Documented validation script fixes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "scripts": {