feat: add includeOperations to search_nodes and patterns mode to search_templates

- Add `includeOperations` flag to search_nodes that returns resource/operation
  trees per result (e.g., Slack: 7 resources, 44 operations). Saves a get_node
  round-trip when building workflows.
- Add `searchMode: "patterns"` to search_templates — lightweight workflow pattern
  summaries mined from 2,700+ templates (node frequency, co-occurrence, connection
  chains across 10 task categories).
- Fix operations extraction: use filter() instead of find() to capture ALL
  operation properties, each mapped to its resource via displayOptions.
- Fix FTS-to-LIKE fallback silently dropping search options.
- Add mine-workflow-patterns.ts script (npm run mine:patterns).
- Restore 584 community nodes in database after rebuild.

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

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

tests/unit/mcp/tools.test.ts

@@ -151,7 +151,7 @@ describe('n8nDocumentationToolsFinal', () => {
       it('should have searchMode parameter with correct enum values', () => {
         const searchModeParam = tool?.inputSchema.properties?.searchMode;
         expect(searchModeParam).toBeDefined();
-        expect(searchModeParam.enum).toEqual(['keyword', 'by_nodes', 'by_task', 'by_metadata']);
+        expect(searchModeParam.enum).toEqual(['keyword', 'by_nodes', 'by_task', 'by_metadata', 'patterns']);
         expect(searchModeParam.default).toBe('keyword');
       });