chore: update n8n to 2.13.3 and bump version to 2.41.0

- Updated n8n from 2.12.3 to 2.13.3
- Updated n8n-core from 2.12.0 to 2.13.1
- Updated n8n-workflow from 2.12.0 to 2.13.1
- Updated @n8n/n8n-nodes-langchain from 2.12.0 to 2.13.1
- Rebuilt node database with 1,396 nodes (812 core + 584 community: 516 verified + 68 npm)
- Refreshed community nodes with 581 AI-generated documentation summaries
- Improved documentation generator: strip <think> tags, raw fetch for vLLM chat_template_kwargs
- Incremental community updates: saveNode uses ON CONFLICT DO UPDATE preserving READMEs/AI summaries
- fetch:community now upserts by default (use --rebuild for clean slate)
- Updated README badge and node counts
- Updated CHANGELOG and MEMORY_N8N_UPDATE.md

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

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

dist/mcp/tools-n8n-manager.js

@@ -590,7 +590,7 @@ exports.n8nManagementTools = [
     },
     {
         name: 'n8n_manage_datatable',
-        description: `Manage n8n data tables and rows. Actions: createTable, listTables, getTable, updateTable, deleteTable, getRows, insertRows, updateRows, upsertRows, deleteRows. Requires n8n enterprise/cloud with data tables feature.`,
+        description: `Manage n8n data tables and rows. Actions: createTable, listTables, getTable, updateTable, deleteTable, getRows, insertRows, updateRows, upsertRows, deleteRows.`,
         inputSchema: {
             type: 'object',
             properties: {
@@ -600,10 +600,10 @@ exports.n8nManagementTools = [
                     description: 'Operation to perform',
                 },
                 tableId: { type: 'string', description: 'Data table ID (required for all actions except createTable and listTables)' },
-                name: { type: 'string', description: 'For createTable/updateTable: table name' },
+                name: { type: 'string', description: 'For createTable: table name. For updateTable: new name (rename only — schema is immutable after creation)' },
                 columns: {
                     type: 'array',
-                    description: 'For createTable: column definitions',
+                    description: 'For createTable only: column definitions (schema is immutable after creation via public API)',
                     items: {
                         type: 'object',
                         properties: {