curl --request GET \
  --url 'https://backend.testeswaffle.org/subscription/summary?format=executive' \
  --header 'Authorization: Bearer seu-token-jwt'

{
  "success": true,
  "data": {
    "overview": {
      "total_subscribers": 45230,
      "active_rate": 93.2,
      "monthly_growth": 7.8,
      "churn_rate": 2.1
    },
    "highlights": {
      "best_performing_newsletter": "thenews",
      "top_acquisition_source": "referral",
      "engagement_score": 82
    },
    "trends": {
      "growth_trend": "increasing",
      "seasonality": "higher_on_weekdays",
      "forecast_next_month": 48500
    },
    "recommendations": [
      {
        "priority": "high",
        "action": "Intensificar programa de referências",
        "impact": "Aumento de 15% em novas inscrições"
      },
      {
        "priority": "medium",
        "action": "Otimizar horário de envio para fins de semana",
        "impact": "Melhoria de 5% na taxa de abertura"
      }
    ],
    "generated_at": "2024-01-15T14:30:00Z"
  }
}