Allow to determine consequence of max worker limit

[jonnor]

To get an idea about what message rates/levels one can sustain with a particular config.
Should say something about what the limit (jobs/second) is when hitting max workers.

Maybe also how much delayed jobs would be if a sustained over-limit rates occur?

[jonnor]

Related, relatively simple is to allow modifying the config, especially for 'simulating' different possible scenarios - maybe that could incur due to changes in the service-under-scaling itself. What if processing took twice as long on average.

[jonnor]

Might also want to validate that the configuration can sustain a certain maximal input rate.