Ironflow Event Fan-Out Diagram

Triggers are one consumer, not the delivery

The outbox row commits before DispatchMatched runs, so it needs no match
Zero matching functions returns an empty run list, not an error
Before #487 non-entity emit never reached NATS at all

What append adds

Two outbox rows: entity:{type}.{id}.{name} plus events:{name}
The entity row is patched with the version assigned inside the txn
A version conflict writes neither row — no orphan NATS message

Delivery outside the outbox

append() also fires system.stream.{entityId}.appended (#1730)
That notification has no retry or dead-letter queue
waitForEvent uses scheduler DB correlations via DispatchMatched; no nats_seq dependency