List calls

curl --request GET \
  --url https://api.vatel.ai/v1/calls \
  --header 'Authorization: Bearer <token>'

{
  "calls": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "graph_version_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "organization_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "party_number": "<string>",
      "status": "connected",
      "source": "twilio",
      "termination_reason": "<string>",
      "extracted_variables": [
        {
          "name": "<string>",
          "type": "system",
          "description": "<string>",
          "value": "<unknown>",
          "dataType": "string",
          "rationale": "<string>"
        }
      ],
      "outbound": true,
      "outbound_contact_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "outbound_list_run_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "created_at": "<string>",
      "connected_at": "<string>",
      "started_at": "<string>",
      "ended_at": "<string>",
      "summary": "<string>",
      "transcript": {
        "entries": [
          {
            "index": 123,
            "role": "<string>",
            "message": "<string>",
            "type": "message",
            "toolCall": {
              "itemId": "<string>",
              "callId": "<string>",
              "toolName": "<string>",
              "arguments": "<string>",
              "output": "<string>",
              "startedAt": "2023-11-07T05:31:56Z",
              "endedAt": "2023-11-07T05:31:56Z"
            },
            "toolCallOutput": "<string>",
            "createdAt": "2023-11-07T05:31:56Z",
            "durationMs": 123,
            "turnId": "<string>"
          }
        ]
      },
      "cost": 123,
      "tags": [
        "<string>"
      ],
      "duration_seconds": 123
    }
  ],
  "pagination": {
    "page": 123,
    "page_size": 123,
    "total": 123,
    "total_pages": 123,
    "has_next": true,
    "has_prev": true
  }
}