Collect server telemetry data to get fine grained measures

[danieldietrich]

We want to find out where the bottlenecks are when there is heavy load on the server side. The idea is to instrument the application and trace the measures.

OpenTelemetry seems to be a got fit, it supports several libraries and frameworks out of the box.

Additional to instrumentation, we need to collect the data. The easiest way to do that is logging.