Unfortunately, we weren't able to complete this feature within our time frame, and the remaining work is significant. Most importantly, we saw a performance regression when briefly deploying, probably caused by MediaWiki parsing revisions multiple times. We also haven't solved the migration questions, since geoshape expansion will change the inline mapframe content hashes and therefore will cause breakage.
We'll remove the code for now:
- Remove geoshape expansion from the Kartographer extension.
- Remove the feature flags from mediawiki-config.