FileListResponse

{
    "Items": [
        {
            "Id": "file-20251014203105-ll4pb",
            "FileName": "demo.mp4",
            "FileSize": 109322727,
            "Purpose": "user_data",
            "Status": "processing",
            "CreateTime": 1760445065,
            "UpdateTime": 1760445100,
            "URL": "https://example.com/files/file-20251014203105-ll4pb"
        }
    ],
    "PageNumber": 1,
    "PageSize": 20,
    "TotalCount": 2
}