RQ overrides

• Adds Job.set_description to update the existing description attribute without updating the entire job
• Adds Job.get_progress and Job.set_progress to update a new float attribute on a Job indicating progress
• Add user_id to the Job a registry to list all jobs for a user
• Add an endpoint to list jobs by user ID for connected user

No more obstacles 🎉

Implementation notes:

• Some tests are broken due to broken permissions; IsVerified seemingly behaves like IsVerifiedOrReadOnly #554 (closed)
• Element deletions have almost no progress indication for now as .trash(delete_children=True) calls .trash(delete_children=False), making progress reports extra complex.
• The rq module was initially called arkindex.project.rq but got renamed to arkindex.project.rq_overrides because, only in CI, Python would get confused between the real rq and this module.