Function evaluate_workflow 

pub fn evaluate_workflow(
    graph: &Graph,
    cases: &[GoldenCase],
    limit: usize,
    depth: usize,
    width: usize,
    max_nodes: usize,
) -> WorkflowReport

Score the internal decomposition artifact produced from a focused context pack.

This evaluates structural usefulness, not task execution: valid acyclic decomposition, bounded size, expected operator chain, deterministic initial ready task, and inspection coverage for judged context nodes.