fix: improve n8n_list_workflows pagination clarity and performance (Issue #54)

- Changed misleading 'total' field to 'returned' to clarify it's the count in current page
- Added 'hasMore' boolean flag for clear pagination indication
- Added '_note' guidance when more data is available
- Applied same improvements to n8n_list_executions for consistency

Performance improvements:
- Tool now returns only minimal metadata instead of full workflow structure
- Reduced response size by ~95% (from thousands to ~10 tokens per workflow)
- Eliminated token limit errors when listing workflows with many nodes
- Updated descriptions and documentation to clarify minimal response

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

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

src/mcp/tools-n8n-manager.ts

@@ -201,7 +201,7 @@ export const n8nManagementTools: ToolDefinition[] = [
   },
   {
     name: 'n8n_list_workflows',
-    description: `List workflows with optional filters. Supports pagination via cursor.`,
+    description: `List workflows (minimal metadata only). Returns id/name/active/dates/tags. Check hasMore/nextCursor for pagination.`,
     inputSchema: {
       type: 'object',
       properties: {
@@ -323,7 +323,7 @@ export const n8nManagementTools: ToolDefinition[] = [
   },
   {
     name: 'n8n_list_executions',
-    description: `List workflow executions with optional filters. Supports pagination.`,
+    description: `List workflow executions (returns up to limit). Check hasMore/nextCursor for pagination.`,
     inputSchema: {
       type: 'object',
       properties: {