requestAttention

Pull the user BACK to the current foreground operation with a heads-up alert (#264 inbound) — e.g. a protocol step that needs their input, or a counterparty's move. Fires an alerting notification that taps back to the operation's screen. title/body are YOUR strings (the SDK emits none). No-op outside a tracked operation; the host suppresses it when the app is already foreground, so you can call it unconditionally.