Perfspect hangs instead of resuming collection when containers stop in cgroup scope

[hsane-dev]

Environment:
perfspect version 3.6.1_2025-04-28_4282e576
Ubuntu 22.04
kernel 6.8.0-1024-aws
EC2_INSTANCE_TYPE=m7i.metal-24xl

Issue: Perfspect does not resume collection when old containers stop and new containers spawned, but rather remains in hang state.

How to reproduce:
Run a container with some benchmark (say stress-ng), invoke perfspect with this command line "sudo ./perfspect metrics --live --scope cgroup", it correctly collects metrics per c-group every default (5s) interval. However, if the container is stopped, perfspect stops sending any stdout, which is also correct. Now when a new container is spwaned, it does not pick it up even after the 30s refresh interval.

Likely my environment, or the refresh is not catching the new container/cgroup correctly and resuming collection?