curl --request GET \
  --url https://api.getgranite.ai/api/analytics/summary

{
  "total_executions": 0,
  "completed": 0,
  "total_failures": 0,
  "success_rate": 0,
  "avg_duration_ms": 0,
  "active_today": 0,
  "total_tokens": 0
}