Function create_presigned 

pub async fn create_presigned(
    action_user: ActionUser,
    __arg1: Extension<MaxFileSizeBytes>,
    __arg2: TenantDb,
    __arg3: TenantStorage,
    __arg4: Path<DocumentBoxScope>,
    __arg5: Garde<Json<CreatePresignedRequest>>,
) -> Result<(StatusCode, Json<PresignedUploadResponse>), DynHttpError>

Create presigned file upload

Creates a new “presigned” upload, where the file is uploaded directly to storage and processed asynchronously.

Use the task ID from the response to poll the file processing progress.