ReadonlyauthorizationDigest of the resume context's authorization-scope fingerprint, never the fingerprint itself.
ReadonlyformatReadonlykeyReadonlyobservedReadonlyqueryReadonlyresumeReadonlysavedReadonlyschemaReadonlysourceReadonlysource
One persisted checkpoint record.
savedAtis the checkpoint's own observation time and drives expiry;observedAtis when this store wrote the record and drives eviction order. Recent event ids are deliberately absent: they are bounded delivery history, not resume state, so a restored checkpoint starts with an empty id window while its ordering guarantees are unchanged.