refactor(usage): Antigravity usage is a reader on its driver (#17579)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
9a0766b023Julius Marminge committed on 10/9/2026, 10:26:19 PM· committed by GitHubparent5a9c664
11 files changedLine totals unavailable