Tracking task for the initial deployment of #structured-data-commons.
The basic functional is the ability to store and edit multi-lingual image captions in file description pages, using #mediawiki-extensions-wikibasemediainfo in combination with #structured-data-commons. Having arbitrary statements on MediaInfo entities is //not// required, see {T199352} for that.
This requires MCR milestone MCR-SDC-2
Top-level steps needed:
[x] {icon check, color=green} MediaWiki database layer ready
[x] {icon check, color=green} Production database ready: {T198308}
[x] {icon check, color=green} MediaWiki storage layer ready: {T207308}
[x] {icon check, color=green} MediaWiki front-end ready: {T207309}
[x] {icon check, color=green} Existing extensions ready: {T204582}
[ ] SDC code ready: {T205732}
[ ] SDC code deployment: {T159708}