Post-call webhooks

{
  "event": "call.completed",
  "timestamp": "2026-08-26T14:32:07.000Z",
  "data": {
    "call_id": "c1b2c3d4-0000-4000-8000-000000000010",
    "tenant_id": "9f86d081-0000-4000-8000-000000000020",
    "assistant_id": "1b2c3d4e-0000-4000-8000-000000000030",
    "direction": "outbound",
    "status": "completed",
    "duration_sec": 132,
    "transcript": {
      "items": [
        { "type": "message", "role": "assistant", "content": ["Hi, this is Alex from Riverside Dental."] },
        { "type": "message", "role": "user", "content": ["Hi, yes, I have a moment."] }
      ]
    },
    "collected": { "appointment_time": "2026-09-02T10:00:00Z" },
    "variables": { "lead_quality": "high" },
    "input_variables": { "customer_name": "Max Mustermann" },
    "analysis": {
      "summary": "Customer confirmed interest and booked a demo.",
      "sentiment": "positive",
      "success": true,
      "success_reason": "Appointment booked"
    },
    "qa_scorecard": null
  }
}