fix: restore community nodes with resource-grouped operations (v2.42.1)

- Restore 584 community nodes from n8n 2.13.3 DB snapshot
- Re-extract operations from properties_schema with resource grouping
  (366 community nodes now have named resources, up from 10)
- Fix community-node-service.ts extractOperations() to extract resource
  from displayOptions.show.resource
- Bump version to 2.42.1

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "n8n-mcp",
-  "version": "2.42.0",
+  "version": "2.42.1",
   "description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",