curl --request GET \
  --url https://juiywycqytekaffjcbfa.supabase.co/functions/v1/api-v1/appointments/{id} \
  --header 'x-api-key: <api-key>'

{
  "success": true,
  "data": {
    "appointment": {
      "id": "<string>",
      "title": "<string>",
      "start_time": "<string>",
      "end_time": "<string>",
      "status": "<string>",
      "customer_name": "<string>"
    }
  }
}