backstage release v2.15.0

Added

• Serving page shows every step of a served model — model-manager’s timeline per row (bytes, then cached, on the weights step; failures as failed steps), Try it at Ready as the person, Stopping until gone in #2422 by @teemow

Full Changelog: https://github.com/giantswarm/backstage/compare/v2.14.0...v2.15.0