Public uploads should be public immediately, before processing finishes

[eyeseast]

If I upload a document with access set to public, it's not actually public in the API until it finishes processing. This was necessary when we were rendering documents as images, but PDF.js means we can render a document immediately.

This really only affects large documents that take more than a minute to process, but it shows up in force when processing gets jammed or broken.

[mitchelljkotler]

This does not work if you upload a non-PDF document that needs to first be converted

[eyeseast]

This does not work if you upload a non-PDF document that needs to first be converted

I think that's a small minority of cases, though, right? But maybe we can make the document public as soon as there's a PDF. That's usually going to be on upload, but in some cases it's after the conversion step.