Function build_and_run_report 

fn build_and_run_report<R: SagaActionRunner>(
    cmd: &Command,
    kind: CommandKind,
    runner: &R,
    saga_id_for_report: Option<u64>,
) -> Command

Run the action for cmd and synthesize the corresponding Report* Command. saga_id_for_report is what the Report’s echo field carries — Some(N) when the dispatch was saga-driven, None for the no-saga bypass path.