Zip extraction should not use private queue

[rgov]

If I upload a .zip file there is a task enqueued to expand it. If I have a private queue, this means that my own worker system will do the work of expanding the archive. This is probably a bad idea because it means the whole archive has to be downloaded and then re-uploaded again.

[waxlamp]

Thanks for filing this. I agree that it's a bit silly/wasteful of bandwidth to have your local, private runner download and upload files you already have in hand. We'll think about how we could make this better.