`om health` custom health checks?

Nobody has claimed this yet.

Is there a need to let users configure custom health checks?

Here's one use-case from on top of my mind:

- Checking if there are any services running globally; sometimes that can cause problems if we are using services-flake to startup project specific services. If we are looking for an experience where we ensure that, “If health checks pass, then everything will work fine, almost always.”, then this might be a good addition.

Let's list down more such scenarios here and see if this feature is worth adding

The issue names only the `om health` command and provides one possible scenario; no file or test is identified. Start by reviewing the command's current health-check behavior and the comment thread for additional scenarios. Done would require an agreed scope and acceptance criteria for configurable checks before implementation can begin.

Written by the indexing model from the issue text.