curl --request GET \
  --url https://api.ravan.ai/api/v1/campaigns/{id} \
  --header 'X-Api-Key: <api-key>'

{
  "success": true,
  "message": "<string>",
  "data": {
    "id": "<string>",
    "organization_id": "<string>",
    "name": "<string>",
    "agent_id": "<string>",
    "phone_number_id": "<string>",
    "from_phone_number": "<string>",
    "status": "<string>",
    "execution_status": "<string>",
    "schedule": {
      "start": "<string>",
      "end": "<string>",
      "window_start": "<string>",
      "window_end": "<string>",
      "window_days": [
        123
      ],
      "timezone": "<string>",
      "max_concurrent": 123,
      "retry_attempts": 123,
      "retry_gap_min": 123
    },
    "contact_stats": {
      "total": 123,
      "contacted": 123,
      "successful": 123,
      "failed": 123,
      "no_answer": 123,
      "pending": 123,
      "in_progress": 123
    },
    "started_at": "<string>",
    "completed_at": "<string>",
    "created_at": "<string>",
    "updated_at": "<string>"
  }
}