What is the problem you're trying to solve

Obtain the PSI metrics for containers managed by contained.

PSI metrics are extremely useful for knowing whether the workloads in a container are busy waiting for CPU, memory or I/O. This can help users quickly pinpoint the likely resource bottleneck of their workloads and, after scaling or other changes, quickly validate if the bottleneck has improved or not.

Describe the solution you'd like

The metrics reported by containerd should also include the PSI metrics for the container

Additional context

https://docs.kernel.org/accounting/psi.html