OnlineSkinAllRaceV2Request(大模型测肤请求（Online Skin / all_race_v2）)

大模型测肤请求，对应 Online Skin 全肤色 V2。支持单张正面或完整三视图；任务成功后扣除对应次数，失败不产生净扣次。

{
    "api_code": "online_skin",
    "algorithm_variant": "all_race_v2",
    "resources": {},
    "output_options": {
        "mask_format": "annotation_image"
    },
    "metadata": {
        "purpose": "client_request_reference"
    }
}