Number of not expired Bindings, labeled by the plan
Average number of not expired bindings per SI with bindings, labeled by the plan
Time of Bind request processing
Time of Unbind request processing
Maximum time to wait for expiration deletion - how long the binding is waiting to be deleted after the expiration: max(now - binding.ExpiredAt). If the value is big then we see that something is wrong with the Job.
Consider and create metrics for usage etc. for Kyma Service Bindings.