feat: add paperless-ngx with OIDC, CNPG db, cp-3 HDD media, MinIO backup

Fixes controlplane.tftpl's install.wipe:true (should be false, live CPs already run false) and syncs coredns Corefile back to what's actually deployed (drops an unrolled-out, stale Kong-era rewrite).

k8s/apps/paperless/redis.yaml

@@ -0,0 +1,37 @@
+# Task queue broker + websocket channel layer for paperless-ngx. No PVC:
+# queued/scheduled task state is disposable - a lost queue on restart just
+# means re-triggering consumption, not data loss (documents themselves live
+# on paperless-media).
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: paperless-redis
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: paperless-redis
+  template:
+    metadata:
+      labels:
+        app: paperless-redis
+    spec:
+      containers:
+        - name: redis
+          image: redis:7-alpine
+          ports:
+            - containerPort: 6379
+          resources:
+            requests: { cpu: "50m", memory: "64Mi" }
+            limits: { cpu: "250m", memory: "256Mi" }
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: paperless-redis
+spec:
+  selector:
+    app: paperless-redis
+  ports:
+    - port: 6379
+      targetPort: 6379