In others words, if we use external database and storage is set to DB, can we consider Zammad pod (Helm deployment) is stateless ? (in that case it could be deployed as a Deployment)
I would like to avoid setting up another backup system if the database backup is already good enough.
That’s not a question anyone here can answer for you.
Check the TOS of your cloud provider.
Usually, even through providers claim to create backups, they also have a clause in their TOS that tells you “backup or you’re sorry in case of a loss”.
I personally would always opt for being safe instead of sorry.