Function journal_migration 

pub fn journal_migration(
    tx: &Connection,
    tag: &str,
    checksum: Option<&str>,
    content_checksum: &str,
    run_id: &str,
    statements: &str,
    applied_at: i64,
) -> Result<(), BookkeepingError>

Record that tag’s ddl entry has been minted, inside the caller’s open transaction (so the journal can never disagree with the log entry it guards across a crash, §4).