curl -X PATCH https://api.neuraldraft.io/v1/bookings/503 \
  -H "Authorization: Bearer ndsk_live_yourkey" \
  -H "Content-Type: application/json" \
  -d '{"admin_notes":"Customer prefers a chair-supported version."}'

{
  "id": 503,
  "booking_reference": "BK-20260419-AB12",
  "customer_name": "<string>",
  "customer_email": "jsmith@example.com",
  "starts_at": "2023-11-07T05:31:56Z",
  "service": {
    "id": 12,
    "name": "60-minute private yoga",
    "slug": "60-minute-private-yoga"
  },
  "customer_phone": "<string>",
  "ends_at": "2023-11-07T05:31:56Z",
  "price_charged": 123,
  "currency": "<string>",
  "customer_notes": "<string>",
  "admin_notes": "<string>",
  "cancellation_reason": "<string>",
  "cancelled_at": "2023-11-07T05:31:56Z",
  "confirmed_at": "2023-11-07T05:31:56Z",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}