This ticket is to track whether the visual changes we're making to the way sister projects are displayed (outside of quickview) in T307468 impacts their CTR, and add that information to the search improvements dashboard in the parent task. The sister projects are already instrumented using existing data/logging.
We also need to collect baselines before we release the changes.
Dashboard for tracking CTR https://superset.wikimedia.org/superset/dashboard/391/?native_filters=%28%29