Scope upstream refresh in checkout effect lifecycle

- Replace fire-and-forget `Effect.runPromise` call with `Effect.forkScoped`
- Keep checkout responsive while tying upstream refresh to scoped effect management
c91b79b6e2Julius Marminge committed on 3/2/2026, 4:06:21 AM· committed by Julius Marmingeparent5e55aa3
1 file changedLine totals unavailable