- metrics from pid1: suppress metrics form units that are inactive and have nothing to report
- how to plug facts into this? i.e. hostname, ssh keys, and so on
- switch to daan's suggested hierarchy?
+ - enforce naming rules: a backend can only report metrics with the prefix of its service name
+ - use that to optimize sorted report generation
+ - figure out report vs. metrics
+ - systemd-report: add prefix matching of metrics
+ - add "hint-suppress-zero" flag (which suppresses all metrics which are zero)
+ - add "hint-object" parameter (which only queries info about certain object)
* implement a varlink registry service, similar to the one of the reference
implementation, backed by /run/varlink/registry/. Then, also implement