curl --request GET \
  --url https://api.fact0.io/api/v1/executions/{executionID}/spans

{
  "spans": [
    {
      "id": "<string>",
      "execution_id": "<string>",
      "parent_span_id": "<string>",
      "caused_by_span_ids": [
        "<string>"
      ],
      "name": "<string>",
      "started_at": "2023-11-07T05:31:56Z",
      "ended_at": "2023-11-07T05:31:56Z",
      "metadata": {}
    }
  ]
}