feat(enterprise-site): add WordPress support and scheduled auto-publish to sites

Add WordPress as an enterprise-site CMS type alongside pbootcms, and let
schedule tasks auto-publish generated articles to enterprise sites.

- WordPress connection/publisher service and tests; register wordpress
  media platform and relax cms_type CHECK constraint
- New publish_enterprise_site_targets JSONB column on schedule_tasks with
  array type constraint; thread targets through scheduler dispatch,
  prompt/KOL generation, and worker
- Admin UI: enterprise-site targets in generate/schedule/publish flows,
  KOL package form, MediaView, and i18n strings

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

server/cmd/worker-generate/main.go

@@ -74,7 +74,11 @@ func main() {
 		app.Logger,
 		app.ConfigStore,
 	).WithCache(app.Cache)
+	enterpriseSiteSvc := tenantapp.NewEnterpriseSiteService(app.DB, app.ConfigStore).
+		WithCache(app.Cache).
+		WithObjectStorage(app.ObjectStorage)
 	promptRuleSvc.WithPublishJobService(publishJobSvc)
+	promptRuleSvc.WithEnterpriseSiteService(enterpriseSiteSvc)
 
 	imitationSvc := tenantapp.NewArticleImitationService(
 		app.DB,
@@ -93,7 +97,10 @@ func main() {
 		app.Logger,
 		generationCfg,
 		app.Config().LLM.MaxOutputTokens,
-	).WithCache(app.Cache).WithConfigProvider(app.ConfigStore)
+	).WithCache(app.Cache).
+		WithPublishJobService(publishJobSvc).
+		WithEnterpriseSiteService(enterpriseSiteSvc).
+		WithConfigProvider(app.ConfigStore)
 
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()