pub fn append_use(j: &Journal, rec: ApprovalUse) -> Result<Head, JournalError>Expand description
Append an ApprovalUse to the journal. The caller MUST set
previous_record_digest to the current head’s digest on the
incoming record; we re-validate before write. record_digest is
computed from the canonical form and stamped on the stored record.
Returns the new head’s index and digest.