Investigate listing the "Onboarding New Developers" KPIs of https://meta.wikimedia.org/wiki/Technical_Collaboration/Metrics#Onboarding_New_Developers on a custom dashboard:
- Developers contributing patches for review
- New developers attracted
- New developers retained
- KPI3 will definitely require a custom DB query.
- visualization-wise, all these KPIs will require displaying 3-month bars. Which Kibana might not offer by default?
- this will also require me to get a better understanding how to define custom searches, visualizations and dashboards (C_ index to not get overwritten by upstream software updates)