Function run_converted 

pub fn run_converted(
    plan: &Plan,
    convert: &Convert,
    cancel: &AtomicBool,
    on_step: impl FnMut(&Step, bool),
) -> Result<Vec<PathBuf>>

Runs a plan_converted plan: each step’s original is converted and written beside its destination, then renamed into place. cancel stops it between files, as in run.