Function record_run 

pub fn record_run(
    doc: &mut AutoCommit,
    label: &str,
    by: Option<&str>,
    steps: &[RunStep],
) -> Option<String>

Record a run. Returns the document key, which is also AgentRun::id. The transaction is left open — the caller commits, so the record lands stamped and attributed like any other edit. A run with no steps is not recorded: nothing changed, so there is nothing to offer undo on.