Covers running stateful systems — databases, queues, search indexes — on Kubernetes, including StatefulSets and stable identity, durable storage, backup and failover built into the platform rather than bolted on, and the tradeoff between self-managing a stateful service and paying for a managed one. Use this whenever the user deploys a database or queue on Kubernetes, picks a StorageClass, debugs a pod that lost data on restart, or debates self-hosting versus managed. For volume mechanics use `kubernetes-storage`, and for restore discipline use `backup-and-restore`.
