apps/ninja: readd pod backup labels

apps/ninja/invoiceninja/invoiceninja-values-configmap.yaml

@@ -20,6 +20,8 @@ data:
           more_set_headers "Content-Security-Policy: frame-ancestors 'self' ${nextcloud_domain}";
     commonLabels:
       stackspin.net/backupSet: "invoiceninja"
+    podLabels:
+      stackspin.net/backupSet: "invoiceninja"
     podAnnotations:
       backup.velero.io/backup-volumes: "public"
     persistence:

overrides/stackspin-apps-custom.yaml

 # This list of apps is loaded by the Stackspin dashboard on startup, and it
 # will insert any missing entries into the Stackspin database (`apps` table).
+# Processed in https://open.greenhost.net/stackspin/dashboard/-/blob/main/backend/areas/apps/models.py?ref_type=heads#L135
 apiVersion: v1
 kind: ConfigMap
 metadata: