file_id 转为上游请求体字段 Id,再调用 Action=GetFile。curl --location 'https://www.northrouter.com/api/doubao/files/' \
--header 'Authorization: Bearer ' \
--header 'New-Api-User: 1'{
"Id": "file-20251018114827-6zgrb",
"FileName": "demo.mp4",
"FileSize": 695110,
"Purpose": "user_data",
"Status": "active",
"CreateTime": 1760759307,
"UpdateTime": 1760759400,
"URL": "https://example.com/files/file-20251018114827-6zgrb"
}