캠페인 조회

curl --request GET \
  --url https://client-api.tryvox.co/v3/campaigns/{campaign_id} \
  --header 'Authorization: Bearer <token>'

{
  "id": "<string>",
  "name": "<string>",
  "status": "draft",
  "agent": {
    "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "agent_version": "current"
  },
  "from_number": "<string>",
  "total_calls": 123,
  "completed_calls": 123,
  "failed_calls": 123,
  "concurrency": 123,
  "active_concurrency": 123,
  "created_at": 123,
  "presentation_number": "<string>",
  "scheduled_at": 123,
  "finished_at": 123,
  "paused_at": 123,
  "paused_by": "user",
  "call_time_window": {
    "windows": [
      {
        "start_min": 1,
        "end_min": 123,
        "days": [
          "Monday"
        ]
      }
    ],
    "timezone": "Asia/Seoul",
    "auto_resume": true
  }
}