Function check_mutation_path_rules 

pub fn check_mutation_path_rules(
    manifest: &Manifest,
    file_path: &str,
) -> Vec<Violation>

The path-decidable half of a mutation’s verdict — the rules that never needed content. Split out so F48 Phase B can run them BEFORE attempting a reconstruction: a path rule must fire whatever the edits would have produced, and must never be masked by a reconstruction failure.