File upload: Investigate cleaning up /temp directory more proactively through app.

[kcondon]

Recently we found the /temp directory under the files storage directory was consuming a large amount of space and seemed to be in part related to failed file uploads and ingests.

Can we investigate cleaning this up more proactively so we don't use up a lot of disk space?

We have put a cleaner job in place in the meantime for files older than 1 day.

[bencomp]

Definitely related to #2125, as the caching may have caused this. There may be a difference between the directory for uploaded files before they are saved and the temporary directory in which processing of files takes place.

[tomck]

While a cleaner job works, I've noticed that after files have been moved from the first state, currently-being-uploaded, to the second state, uploaded-but-not-saved, they lose the 'tmp' and 'upload' head and tail. But, after being saved, they're copied (not moved) to their destination directory, so they sit in temp taking up space. I would think at least files that have been successfully placed in their final location would be automatically removed.