Starts building a zip of a published version, or of files and folders
of it, up to 10 GB; above that, use the Pennsieve agent. Poll
GET /public/archives/{id} until it's READY, then get a link. The
archive is kept for 72 hours.
Signed-in archives email you when they're ready (notify, as for
workspace archives); the email links to the dataset in Discover.
Embargoed versions work for users with access to them: their files
are listed when you ask, so a selection of more than 20,000 files is
refused (413); download it with the agent.