arrstack: fix sync-wave deadlock + config multi-attach

The active-active arrstack deploy (#383) was stuck: the app Deployments
(wave 0) can't become Healthy without their database, so ArgoCD never
advanced to wave 1 to create the shared Postgres cluster. And /config was
an RWO cephrbd PVC, so 3 replicas hit Multi-Attach.

- move DB infra ahead of the apps: VSS + backup ObjectStoreUser/Bucket
  wave -3, CNPG Cluster -2, Databases -1 (apps stay at default 0)
- switch each app's /config to emptyDir (per-pod, stateless; library is
  in Postgres, config is env-driven; MediaCover regenerates). Old RWO
  config PVCs orphan.

apps/base/arrstack/postgres/cnpg_backup.yaml

@@ -7,6 +7,9 @@ kind: ObjectStoreUser
 metadata:
   name: cnpg-arrstack-backup
   namespace: arrstack
+  annotations:
+    # S3 creds Secret must exist before the Cluster (wave -2) reconciles its backup.
+    argocd.argoproj.io/sync-wave: "-3"
 spec:
   displayName: "CNPG backup owner (arrstack)"
   uid: cnpg-arrstack-backup
@@ -19,6 +22,8 @@ kind: Bucket
 metadata:
   name: cnpg-arrstack
   namespace: arrstack
+  annotations:
+    argocd.argoproj.io/sync-wave: "-3"
 spec:
   placementTarget: ec
   bucketName: cnpg-arrstack

apps/base/arrstack/postgres/cnpg_cluster.yaml

@@ -15,7 +15,7 @@ metadata:
     # Wave 1: the per-app <app>-db Secrets (wave 0) must exist first — CNPG reads
     # them as the managed roles' passwordSecret. ArgoCD gates dependents on the
     # Cluster's health status.
-    argocd.argoproj.io/sync-wave: "1"
+    argocd.argoproj.io/sync-wave: "-2"
 spec:
   inheritedMetadata:
     annotations:

apps/base/arrstack/postgres/database-prowlarr.yaml

@@ -8,7 +8,7 @@ metadata:
   name: prowlarr-main
   namespace: arrstack
   annotations:
-    argocd.argoproj.io/sync-wave: "2"
+    argocd.argoproj.io/sync-wave: "-1"
 spec:
   cluster:
     name: arrstack-postgres

apps/base/arrstack/postgres/database-radarr.yaml

@@ -8,7 +8,7 @@ metadata:
   name: radarr-main
   namespace: arrstack
   annotations:
-    argocd.argoproj.io/sync-wave: "2"
+    argocd.argoproj.io/sync-wave: "-1"
 spec:
   cluster:
     name: arrstack-postgres

apps/base/arrstack/postgres/database-sonarr.yaml

@@ -8,7 +8,7 @@ metadata:
   name: sonarr-main
   namespace: arrstack
   annotations:
-    argocd.argoproj.io/sync-wave: "2"
+    argocd.argoproj.io/sync-wave: "-1"
 spec:
   cluster:
     name: arrstack-postgres

apps/base/arrstack/postgres/vaultstaticsecret.yaml

@@ -14,7 +14,7 @@ metadata:
   name: sonarr-db
   namespace: arrstack
   annotations:
-    argocd.argoproj.io/sync-wave: "0"
+    argocd.argoproj.io/sync-wave: "-3"
 spec:
   destination:
     create: true
@@ -33,7 +33,7 @@ metadata:
   name: radarr-db
   namespace: arrstack
   annotations:
-    argocd.argoproj.io/sync-wave: "0"
+    argocd.argoproj.io/sync-wave: "-3"
 spec:
   destination:
     create: true
@@ -52,7 +52,7 @@ metadata:
   name: prowlarr-db
   namespace: arrstack
   annotations:
-    argocd.argoproj.io/sync-wave: "0"
+    argocd.argoproj.io/sync-wave: "-3"
 spec:
   destination:
     create: true

apps/base/arrstack/prowlarr/deployment.yaml

@@ -92,5 +92,4 @@ spec:
               mountPath: /config
       volumes:
         - name: config
-          persistentVolumeClaim:
+          emptyDir: {}
-            claimName: prowlarr-config

apps/base/arrstack/prowlarr/kustomization.yaml

@@ -3,7 +3,6 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - pvc-config.yaml
   - vaultstaticsecret.yaml
   - configmap.yaml
   - deployment.yaml

apps/base/arrstack/radarr/deployment.yaml

@@ -94,8 +94,7 @@ spec:
               mountPath: /media/movies
       volumes:
         - name: config
-          persistentVolumeClaim:
+          emptyDir: {}
-            claimName: radarr-config
         - name: media-movies
           persistentVolumeClaim:
             claimName: media-movies

apps/base/arrstack/radarr/kustomization.yaml

@@ -3,7 +3,6 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - pvc-config.yaml
   - vaultstaticsecret.yaml
   - configmap.yaml
   - deployment.yaml

apps/base/arrstack/sonarr/deployment.yaml

@@ -94,8 +94,7 @@ spec:
               mountPath: /media/tv
       volumes:
         - name: config
-          persistentVolumeClaim:
+          emptyDir: {}
-            claimName: sonarr-config
         - name: media-tv
           persistentVolumeClaim:
             claimName: media-tv

apps/base/arrstack/sonarr/kustomization.yaml

@@ -3,7 +3,6 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - pvc-config.yaml
   - vaultstaticsecret.yaml
   - configmap.yaml
   - deployment.yaml