[SDKs] Improve metadata created by arv-put
When arv-put puts an upload in a Collection, the default name gives information about the upload itself, including the username, hostname, and time. There's general consensus that information about the data itself would be better (file or directory name, or file count for many files, or…), but we also want to have the current upload metadata as sort of provenance information.
- Convert the current upload data default name into some other kind of Link TBD. It might be split over more than one Link. These should always be created, whether or not the user specified a name for the Collection. (The exact structure needs to be fully specified before work begins. Consider if there's a structure that might also let us provide source information for things like sample data—see #3282.)
- When a user specifies a
--name, fill in a default based on the name(s) of what's being uploaded.