통화 목록 조회

{
  "calls": [
    {
      "agent_id": "<string>",
      "call_id": "<string>",
      "call_type": "web",
      "call_from": "<string>",
      "call_to": "<string>",
      "dynamic_variables": {},
      "metadata": {},
      "disconnection_reason": "user_hangup",
      "start_timestamp": 123,
      "end_timestamp": 123,
      "duration_ms": 123,
      "transcript": [
        {
          "role": "agent",
          "content": "<string>",
          "start_at": 123,
          "end_at": 123
        }
      ],
      "transcript_with_tool_calls": [
        {
          "role": "agent",
          "content": "<string>",
          "start_at": 123,
          "end_at": 123
        }
      ],
      "recording_url": "<string>",
      "call_cost": {
        "total_credits_used": 123,
        "duration_seconds": 123
      },
      "call_analysis": {
        "summary": "<string>",
        "user_sentiment": "positive",
        "custom_analysis_data": [
          {}
        ]
      },
      "opt_out_sensitive_data_storage": false
    }
  ],
  "next_cursor": "<string>",
  "total_count": 0
}