获取文档嵌入状态（进度）

{
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "indexing_status": "<string>",
      "processing_started_at": 123,
      "parsing_completed_at": 123,
      "cleaning_completed_at": 123,
      "splitting_completed_at": 123,
      "completed_at": 123,
      "paused_at": 123,
      "error": "<string>",
      "stopped_at": 123,
      "completed_segments": 123,
      "total_segments": 123
    }
  ]
}