Healthcheck for process running

[jollopre]

We'd like to provide a mechanism to communicate with Harmoniser in order to obtain whether or not the process running is healthy or not.
A fair implementation could mean to use UnixSocket so that other OS processes can ask through the Unix socket file for the status of the running process.

QUESTIONS:

• Should we consider changing from killing the process when a channel get timed out to instead inform through the healthcheck about closed channels and leave that responsibility to users of Harmoniser?
• Is there any standard to report healthcheck data?