[Task]: deploy in k8s helm with postgresql db persistence

### What needs to happen?

Hello,
There is little information on the web portal and all the documentation with the persistence process in postgresql db. What is the process and step by step to install apache hop in k8s, using helm, and configure a db postgresql for persistence. To manage the restarts of the pods in k8s without losing data, flows, configurations, and others.
Tnks!

### Issue Priority

Priority: 2

### Issue Component

Component: Hop Config

Review the existing Apache Hop web portal and documentation for Kubernetes, Helm, and PostgreSQL persistence. Document the installation and configuration steps, including how to preserve data, flows, and configuration across pod restarts; done means a newcomer can follow the guide without needing additional persistence instructions.

Written by the indexing model from the issue text.