Add max meetings participants gauge

[pielonet]

This gauge can be used in Grafana to monitor max participants in all meetings Please review and merge... Kind regards, Thierry

[greenstatic]

Couldn't you do the same with a Prometheus query?

[pielonet]

Couldn't you do the same with a Prometheus query?

No ! You do not have access to this information with the current metrics : what you currently get is either the total number of participants in all meetings or a breakdown of the number of participants per meeting.