Add daily backups (CronJob + dedicated PVC, 7-day retention)

values.yaml

@@ -73,6 +73,17 @@ postgres:
   password: ""
   storage: 10Gi
 
+backups:
+  enabled: true
+  # Cron schedule for the automatic backup job. Default 03:00 UTC
+  # daily — quiet hour for most timezones, non-business in EU/US/AS.
+  schedule: "0 3 * * *"
+  # PVC size for retained dumps. Holds ~7 days of dumps for a small
+  # instance; scale up via overlay if the instance has a large DB.
+  storage: 10Gi
+  # How many dumps to retain. Older ones are pruned by the same Job.
+  retain: 7
+
 ingress:
   # Traefik entrypoint name (set on the Traefik install in the
   # `traefik` namespace).