curl -X POST "https://api.nevatal.com/api/v1/appointments" \
  -H "Authorization: Bearer nvtl_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "patientId": "pat_abc123",
    "doctorId": "usr_doctor456",
    "locationId": "loc_main",
    "procedureId": "proc_general_consult",
    "startTime": "2025-04-01T09:00:00-05:00",
    "endTime": "2025-04-01T09:30:00-05:00",
    "notes": "Initial consultation"
  }'

{
  "id": "apt_xyz789",
  "patientId": "pat_abc123",
  "doctorId": "usr_doctor456",
  "locationId": "loc_main",
  "procedureId": "proc_general_consult",
  "startTime": "2025-04-01T09:00:00-05:00",
  "endTime": "2025-04-01T09:30:00-05:00",
  "status": "confirmed",
  "notes": "Initial consultation",
  "createdAt": "2025-03-20T15:00:00Z"
}

{
  "statusCode": 409,
  "error": "Conflict",
  "message": "Time slot overlaps with an existing appointment"
}