Context:
In order to report Backend Metrics like Site statistics as defined in the Tracking Concept

a Backend service reporting statistics to Mixpanel is needed.

AT:

• A service exists in the backend that can periodically report metrics to the Optimize Mixpanel project https://eu.mixpanel.com/project/2574329
• the service is by default disabled via the configuration
• The service reports the following Metrics to Mixpanel:
  • Count of reports (process/decision) per deployment