Archiving a project should create an audit event

Problem to solve

Archiving a project should create a corresponding event in the audit log

Further details

When trying to track down who and when a project was archived, I noticed that these events are not stored in the audit log and seem to only be traceable if you search through the web server access logs for the corresponding POST request.

Proposal

When a project is archived or unarchived, create an audit log event.

What does success look like, and how can we measure that?

When viewing the audit log for a project and the admin audit log for that same project, the archive/unarchive events should be seen.