Goal:
Get the federation feature into users hands to collect feedback and identify issues in real usage environments - At least 3 Wikibases activate the federation feature on a Wikibase

Definition of Done:

Distribution

• A dedicated Docker version is published to DockerHub under a clear version tag
• Docker tag naming does not collide with the standard release naming
• A fresh Wikibase instance can be installed via Docker on a standard server environment (validated on Hetzner) with Federated Values active
• An existing Wikibase instance can upgrade to the Federated Values Docker image without breaking changes

Feature functionality

• The feature is activated by default
• An editor can search for Wikidata items as values within a statement
• Federated values are displayed with correct labels
• Federated values are visually distinguishable from local values in the UI
• API: Federated values are represented in the API output with the correct Wikidata URI
• RDF: Federated values are represented in the RDF output with the correct Wikidata URI and 'Wikidata' as a prefix

Test coverage & errors

• Basic automated test coverage exists for core federation functionality
• The feature has been tested on the Hetzner instance and has no critical errors