Read paths recomputed per-case pass/connectivity independently — report
generation, the logs endpoint, and the frontend each derived it, and the
frontend's every(passed) recompute ignored the engine's authoritative
verdict. Extract resolve_case_verdicts: a single pure seam that prefers
stored case_outcomes verbatim and approximates only for legacy runs. The
logs endpoint now surfaces case_verdicts so the frontend reads instead of
recomputing.