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/kustomization.yaml

@@ -0,0 +1,15 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: paperless
+resources:
+  - pvc.yaml
+  - configmap.yaml
+  - redis.yaml
+  - deployment.yaml
+  - service.yaml
+  - ingress.yaml
+  - backup-cronjob.yaml
+# postgres: paperless-db CNPG Cluster, deployed by k8s/infra/databases (wave 2,
+# before this app at wave 8) - not duplicated here. Same for the paperless-oidc
+# and paperless-minio-creds Secrets, written by PostSync provisioning Jobs in
+# k8s/infra/iam and k8s/infra/minio respectively.