chore(values): set explicit passwords for local deployment

Required since temporal-secret.yaml now validates via required().
Values match the credentials used at initial cluster install.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

charts/postiz/values.yaml

@@ -67,7 +67,7 @@ postgresql:
     # postgresPassword is used by the temporal init job to create the temporal user.
     # Set this explicitly; if left empty, Bitnami generates a random password
     # that the init job cannot retrieve.
-    postgresPassword: ""
+    postgresPassword: "postgres-admin-password"
   service:
     ports:
       postgresql: 5432
@@ -101,7 +101,7 @@ temporal:
     # Credentials for the temporal user created in the shared PostgreSQL instance.
     # The init job creates this user via the postgres superuser before Temporal starts.
     user: temporal
-    password: ""
+    password: "temporal-password"
     # seeds: PostgreSQL hostname. Defaults to the Bitnami postgresql sub-chart service.
     seeds: ""