Function evaluate_with_config 

pub fn evaluate_with_config(
    graph: &Graph,
    cases: &[GoldenCase],
    limit: usize,
    config: RankerConfig,
) -> EvalReport

Like evaluate, but with an explicit [RankerConfig] — the injection seam for the dev-only parameter sweep (eidos-eval-runner --k1/--b/--weights). The kernel never reads the environment.