Get Campaign Status

curl --request GET \
  --url https://api.example.com/v1/campaigns/{campaign_id}

{
  "campaign_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "status": "<string>",
  "tool": "<string>",
  "created_at": 123,
  "started_at": 123,
  "completed_at": 123,
  "error_message": "<string>"
}