feat(helm): add Temporal support and expand env coverage for v2.21.8

- Chart.yaml: bump to version 1.1.0, appVersion v2.21.8
- values.yaml: add temporal section (enabled/address/namespace/tls/apiKey/postgresql),
  expand env (~40 non-sensitive vars) and secrets (~60 sensitive vars) to match
  current Postiz documentation — covers all social providers, email SMTP,
  OAuth OIDC, AI/generation, analytics, MCP, payments, short-link services
- postiz-config.yaml: inject TEMPORAL_ADDRESS (auto-computed or override),
  TEMPORAL_NAMESPACE and TEMPORAL_TLS when temporal.enabled or address is set
- temporal-deployment.yaml: temporalio/auto-setup:1.28.1, postgres12 backend,
  ES disabled, dynamicconfig volume mount, liveness/readiness probes
- temporal-service.yaml: ClusterIP on port 7233 (gRPC)
- temporal-dynamicconfig.yaml: ConfigMap with development-sql.yaml content
- temporal-init-job.yaml: post-install/upgrade Job that creates the temporal
  PostgreSQL user via the postgres superuser before Temporal starts
- temporal-secret.yaml: Secret for temporal PostgreSQL credentials
- NOTES.txt: post-install guidance, search-attribute creation reminder,
  multi-replica/local-storage warning, backup reminder

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

charts/postiz/templates/postiz-config.yaml

@@ -7,4 +7,11 @@ metadata:
 data:
   {{- range $key, $value := .Values.env }}
   {{ $key }}: {{ $value | quote }}
-  {{- end }}
+  {{- end }}
+  {{- if .Values.temporal.enabled }}
+  TEMPORAL_ADDRESS: {{ default (printf "%s-temporal:7233" (include "postiz.fullname" .)) .Values.temporal.address | quote }}
+  TEMPORAL_NAMESPACE: {{ .Values.temporal.namespace | default "default" | quote }}
+  TEMPORAL_TLS: {{ .Values.temporal.tls | toString | quote }}
+  {{- else if .Values.temporal.address }}
+  TEMPORAL_ADDRESS: {{ .Values.temporal.address | quote }}
+  {{- end }}