Function build_dead_code_next_steps 

pub fn build_dead_code_next_steps(
    results: &AnalysisResults,
    root: &Path,
    offer_setup: bool,
    digest: Option<ImpactDigest>,
) -> Vec<NextStep>

Next-steps for standalone fallow dead-code. offer_setup is the caller’s setup_pointer_applicable result (threaded as a parameter so the builders stay free of env/filesystem probes and deterministic under test).