In production, all edits are scored by ORES and the scores are loaded into the search index, and used by the articletopic: search keyword. In the beta cluster and in developer setups, that doesn't happen, rendering features which rely on ORES topics useless. To ease testing of such features, we want a maintenance script which adds ORES topics to the search index directly, for a large number of articles (ideally in a meaningful way, but completely random topics are still better than nothing).
Since GrowthExperiments is currently the only extension using ORES topics, that seems like the logical place for the script, although it could be somewhere else (like CirrusSearch) if that's deemed useful.