chore: release v2.13.0 - webhook autofixer and enhanced node suggestions

## 🎉 Release Highlights

### ✨ New Features
- **Webhook Path Autofixer**: Automatically generates UUIDs for webhook nodes missing path configuration
- **Enhanced Node Type Suggestions**: Intelligent node type correction with similarity matching
- **n8n_autofix_workflow Tool**: New MCP tool for automatic workflow error correction

### 🔒 Security & Performance
- Eliminated ReDoS vulnerability in NodeSimilarityService
- Optimized Levenshtein distance algorithm from O(m*n) to O(n) space
- Added cache invalidation with version tracking to prevent memory leaks

### 📚 Documentation
- Comprehensive CHANGELOG entry with detailed feature descriptions
- Updated README with new autofixer tool documentation
- Added tool usage examples in validation workflow

All 16 test cases passing with 100% success rate.

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

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

package.runtime.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp-runtime",
-  "version": "2.12.0",
+  "version": "2.13.0",
   "description": "n8n MCP Server Runtime Dependencies Only",
   "private": true,
   "dependencies": {