DualReadSummarySink typedef
Emits one durable round-summary note (§0.4) — AttemptNote REQUIRES a
sessionId, so the vehicle is always keyed to a real session: the session
that just reached its terminal, or (at the clean-down fixpoint) the LAST
terminal session of the boot.
Implementation
typedef DualReadSummarySink = void Function(String sessionId, String body);