CHORE(app): use postgresql-cnpg secret

- Changed databases/postgresql to databases/postgresql-cnpg
- This aligns with the standardized PostgreSQL setup
- Fixes secret sync errors in mas namespace

deploy/k8s/overlays/prod/externalsecret.yaml

@@ -35,11 +35,11 @@ spec:
   data:
     - secretKey: password
       remoteRef:
-        key: databases/postgresql
+        key: databases/postgresql-cnpg
         property: PASSWORD
     - secretKey: postgres-password
       remoteRef:
-        key: databases/postgresql
+        key: databases/postgresql-cnpg
         property: POSTGRES_PASSWORD
 ---
 apiVersion: external-secrets.io/v1beta1
@@ -57,6 +57,6 @@ spec:
   data:
     - secretKey: password
       remoteRef:
-        key: databases/postgresql
+        key: databases/postgresql-cnpg
         property: POSTGRES_PASSWORD