From the year in review data controller, add categories slide data, so that it is persisted during the usual report generation.
Create code paths for two options and share resulting list with design / PM. Consider printing the list out somewhere in some quick UI and deploying an Experimental build for PM / designer to test.
- A user's top 5 categories without intervention
- A user's top 5 categories that have at least two underscore characters in the titles.
Investigations occurred in the yir-2025-explorations branch and were written up in https://phabricator.wikimedia.org/T382442#11061869. We can likely copy a lot of the work from there.


