{
  "_comment": "缺少 required 欄位 payload 和 received_at；channel_type 不合法；event_id 格式錯誤",
  "event_id": "not-a-uuid",
  "project_id": "awoooi",
  "channel_type": "discord",
  "event_type": "message_received",
  "provider_event_id": "some:event:id"
}
