Cyberduck marks files as failed even when they complete

[slifty]

This may well be related to #45, and probably is! Cyberduck will download files from our service (and the file will exist on drive) but it indicates something went wrong. I'm guessing we are not sending some kind of confirmation signal / there is some piece of the SFTP protocol that needs to be implemented (e.g. an LSTAT check)

[slifty]

the "of 0B" is almost certainly related to the stat problem (stat is not implemented in the current main branch, though it is implemented in a WIP branch).

That said, I do think that this is still an issue and is still related to #45. I'm unable to reproduce this issue AND I'm unable to reproduce 45 right now.

[slifty]

I have not been able to reproduce this and I believe it is addressed now that STAT is properly handled / generated. If it happens again we can re-open this issue.