Expand Graphing trait to allow for creating dynamic graphs during runtime

[wandgitlabbot]

In GitLab, by Daniel Oosterwijk on 2019-11-29

For long-running processes, it might be useful to see the graphs produced in real-time. We should do this through the existing graphing trait, but expand it to include pluggable backends. This might include the following:

• The current solution, where output is only generated when the detector is closed. (Low feedback levels, but simple and already implemented)
• A realtime output, where graphs on disk are updated as new measurements arrive. (Much higher load on the detector's host, but useful to look at for long processes)
• Realtime output to InfluxDB -> Grafana. (Ideal, since Grafana is dynamic and powerful, and would offload the graph creation overhead to an on-demand process that's designed for it)

[wandgitlabbot]

In GitLab, by Daniel Oosterwijk on 2020-01-10

aa65f0a5 removes graphing functionality, so this issue is irrelevant.