POST 流式上传输入素材
POST /loom/v1/inputAssets:uploadStream
所属分组：Input Assets · 输入资产
Raw bytes. Video ≤200 MiB; others ≤10 MiB. X-Filename is a percent-encoded UTF-8 filename. Content-Length is required. Optional SHA-256 must be lowercase hex. Same user/client request ID replays require identical bytes and metadata; 7-day asset lifetime. Old JSON upload stays at 10 MiB.