refactor: update Vault secret paths to new categorized structure

- minio: minio → storage/minio, minio-s3-credentials → storage/minio-s3-credentials
- pgweb: pgweb → storage/pgweb
- postgresql: postgresql → storage/postgresql
- velero: minio → storage/minio, velero → storage/velero
- zot: zot → storage/zot

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pgweb/manifests/secret.yaml

@@ -14,13 +14,13 @@ spec:
   data:
     - secretKey: database-url
       remoteRef:
-        key: pgweb
+        key: storage/pgweb
         property: DATABASE_URL
     - secretKey: auth-user
       remoteRef:
-        key: pgweb
+        key: storage/pgweb
         property: AUTH_USER
     - secretKey: auth-password
       remoteRef:
-        key: pgweb
+        key: storage/pgweb
         property: AUTH_PASSWORD