the primary's authoritative-state fingerprint at generation
the generation this record produces
OptionaloverflowedSet when the change was too large to log; the record carries no statements and a replica meeting it must restore (a truncated list would apply cleanly and be wrong).
the generation it must be applied on top of
the pack generation both sides must agree on
the primary's writes, in order
one delivered generation;
fingerprintis what the replica must hash to after applying