fix(helm): skip temporal init job when reusing postgresql main user

When temporal.postgresql.user == postgresql.auth.username, the user
already exists with CREATEDB — temporalio/auto-setup handles database
creation itself. The init job only runs for a distinct dedicated user.

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

charts/postiz/templates/temporal-init-job.yaml

@@ -1,5 +1,6 @@
 {{- if .Values.temporal.enabled }}
 {{- if .Values.postgresql.enabled }}
+{{- if ne .Values.temporal.postgresql.user .Values.postgresql.auth.username }}
 apiVersion: batch/v1
 kind: Job
 metadata:
@@ -71,3 +72,4 @@ spec:
                   key: POSTGRES_PWD
 {{- end }}
 {{- end }}
+{{- end }}