Add automation run tracking with quota enforcement

- Add track-run action to ActivePieces smoothschedule piece
- Add webhook endpoint to receive run tracking from automations
- Update quota service to increment automation_runs_used count
- Add Celery task for async run tracking
- Update default flows to include track-run step

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/pages/settings/QuotaSettings.tsx

@@ -138,8 +138,6 @@ const QuotaSettings: React.FC = () => {
         return <Calendar className="h-5 w-5" />;
       case 'MAX_AUTOMATION_RUNS':
         return <Bot className="h-5 w-5" />;
-      case 'MAX_AUTOMATED_TASKS':
-        return <Bot className="h-5 w-5" />;
       default:
         return <AlertTriangle className="h-5 w-5" />;
     }