curl --request GET \
  --url https://api.devkit4ai.com/api/v1/payments/stats \
  --header 'Authorization: Bearer <token>'

{
  "total_projects": 123,
  "projects_with_config": 123,
  "projects_with_test": 123,
  "projects_with_live": 123,
  "total_subscriptions": 123,
  "active_subscriptions": 123,
  "total_payments": 123,
  "successful_payments": 123,
  "total_revenue_cents": 123,
  "currency": "usd"
}