List Breakout Entities

curl --request GET \
  --url https://api.upriver.ai/v1/entities/breakout \
  --header 'X-API-Key: <api-key>'

{
  "total_count": 123,
  "entities": [
    {
      "entity_id": "<string>",
      "name": "<string>",
      "entity_type": "<string>",
      "score": 123,
      "velocity": 123,
      "trend_direction": "<string>",
      "top_topics": [
        {
          "topic_id": "<string>",
          "name": "<string>",
          "citations": [
            {
              "title": "<string>",
              "url": "<string>",
              "source_type": "<string>"
            }
          ]
        }
      ]
    }
  ]
}