feat(monitoring): Filter active sessions by session variables

[MoritzWeber0]

Filter active sessions by tool, tool version, connection method and session type.

The values are available as annotations on the Kubernetes service, deployment and pod. Prometheus relabels the annotations to labels.

In Grafana, a dropdown menu allows filtering:

In addition, the dashboard also shows sessions with failed activity monitoring.

Also, a small bug that tools couldn't be updated without the ID attribute is fixed.