AssetItem

{
    "Id": "asset-2026xxxxxxxxxx-xxxxx",
    "Name": "人物正面照",
    "AssetType": "Image",
    "Status": "processing",
    "URL": "https://example.com/portrait.jpg",
    "AssetURL": "asset://ark-asset-cn-beijing/asset-2026xxxxxxxxxx-xxxxx",
    "CreatedTime": "2026-03-28T00:00:00Z"
}