Stable id: a hash of the namespace + the event's idempotency key, or a random id for events without one.
OptionalidempotencyThe inbound dedupe key + content fingerprint the id was derived from (diagnostics).
Ordering partition (namespace + chat): records of one partition are replayed in receivedAt order.
The serialized inbound event (raw is never stored).
Claims charged so far (a release is not charged).
Epoch ms when a pending/failed record becomes due.
OptionalleaseEpoch ms when the current processing lease expires.
OptionalownerLease owner (DurabilityConfig.instanceId).
Strictly increasing per record; 0 before the first claim.
OptionalcompletedOptionallast
One journaled inbound event.