~anthropic/claude-sonnet-latest → A (6:4)

Side A fixes a concrete, high-impact bug (shared sentinel delegate blocking all but the first human voter) with a clean design change (Option<String> instead of sentinel constants) and adds a targeted integration test proving multi-user voting now works. Side B is a broader refactor (async settlement worker, score caching, removing demo-counter code) that is plausible but riskier, less clearly motivated ('nice' commit message), and not tied to a demonstrated user-facing bug.