Build RPM from CI pipeline, use WSGI server to run SCONE, and use one Prometheus metric per register
This is a rebase of !19 (closed). It enables the RPM build from the CI pipeline, moves us to a proper WSGI server, and fixes a bug so we use one metric per register when exporting to Prometheus.
Belongs to #5 (closed), #12 (closed), and #27 (closed).