[Feature request] K8s guidelines on backup & recovery best practices

### Search before asking

- [x] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar.

### Motivation

There is no official guideline on what is the recommended approach for backup and recovery in K8s? I know this is more of an "Enterprise Feature" ask but it would really help to at least state if volume snapshots are safe to be used for backup and recovery purposes for IoTDB.

### Solution

_No response_

### Alternatives

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Es werden keine Repository-Dateien oder Tests genannt. Prüfe zunächst die vorhandene Dokumentation zu Backup und Recovery von IoTDB sowie die Kubernetes-Anleitungen. Ermittle anschließend, ob Volume-Snapshots für Backup und Recovery von IoTDB sicher sind, und dokumentiere die unterstützte Empfehlung.

Vom Indexierungsmodell aus dem Issue-Text verfasst.