Add the ability to resume an upload.

[fr4gment]

This is a feature request.

There are instances where (due to many uncontrollable factors) that an upload is interrupted. Normally for small file uploads, this is fine as we can just re-run the artifact and the upload will finish quickly. If we need to upload a large file (> 1 GB), the client has some mechanisms to handle interrupts (a checkpoint file is created) but if for some reason the collection was stopped (e.g. usually client crashing, flow times out, etc ) then the collection needs to run again and it wastes precious time as the entire upload starts over.

Having the ability to resume or start a collection from where it last left off would be very beneficial in these situations. I realize this may be difficult to do for all functions/plugins, but I think allowing it (somehow) for the upload function would add a lot of value.