Custom metric autoscaling

Server installations now scale on any metric you already collect: add a Prometheus Query trigger under Scaling in installation settings, point it at a Prometheus-compatible endpoint your environment can reach, and give it a query and a threshold. Replica counts can follow request rate, queue lag, or any business metric your own monitoring exposes, instead of only the CPU, memory, queue, and schedule signals Ryvn measures itself. Choose whether the threshold applies per replica or as an absolute value, set an activationThreshold to hold the workload at zero replicas until real demand arrives, and configure it all from the UI or YAML.