apps/forge: try to fix persistence

apps/forge/forgejo-secrets/forgejo-variables.yaml

@@ -7,3 +7,4 @@ metadata:
 spec:
   fields:
   - fieldName: postgresql_password
+  - fieldName: postgresql_admin_password

apps/forge/forgejo/forgejo-values-configmap.yaml

@@ -66,6 +66,9 @@ data:
       podAnnotations:
         backup.velero.io/backup-volumes: "data"
     persistence:
+      enabled: true
+      mount: true
+      create: false
       claimName: forgejo-data
       labels:
         stackspin.net/backupSet: "forgejo"
@@ -89,6 +92,7 @@ data:
             database: gitea
             username: gitea
             password: gitea # "${postgresql_password}"
+            postgresPassword: "${postgresql_admin_password}"
       primary:
         podAnnotations:
           backup.velero.io/backup-volumes: "data"