UploadStatus

Where an upload is in its lifecycle. Open: new values may be added. consumed and expired are final.

A string. The SDKs keep a value they do not know yet as the string itself (Python: an unknown member carrying it), so a newer server never breaks an older SDK.

Value	Description
awaiting_bytes	Reserved; the bytes have not arrived.
received	The bytes arrived and matched the checksum.
consumed	Used by an operation. Final.
expired	Not used before expiresAt. Final.

Used by CreateUpload.