WikibaseLexemeCirrusSearch is be a parallel extension to WikibaseCirrusSearch to implement lexeme-related functionality.
Patches we need:
[x] Initial code – https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikibaseLexemeCirrusSearch/+/490794
[x] Add to extensions meta-repo – https://gerrit.wikimedia.org/r/c/mediawiki/extensions/+/487063
[x] CI config: Dependencies and test set-up – https://gerrit.wikimedia.org/r/c/integration/config/+/490792
[x] Production branch script – https://gerrit.wikimedia.org/r/c/mediawiki/tools/release/+/497457
[x] Register with TranslateWiki – https://gerrit.wikimedia.org/r/c/translatewiki/+/497996
[x] Prod config: Register i18n – https://gerrit.wikimedia.org/r/c/operations/mediawiki-config/+/497989
[x] Prod config: Add ability to load – https://gerrit.wikimedia.org/r/c/operations/mediawiki-config/+/497988
[x] Prod config: Add to Beta Cluster – hhttps://gerrit.wikimedia.org/r/c/operations/mediawiki-config/+/497990/
[ ] Prod config: Load on Test Wikidata – TBD
[ ] Prod config: Load on Wikidata – TBD
[ ] Prod config: Enable on Test Wikidata – TBD
[ ] Prod config: Enable on Wikidata – TBD
[ ] Migrate configs
[ ] Remove search code from WikibaseLexeme