HH-564: harden durable realtime publish boundaries (#139)

* fix(HH-564): harden durable realtime enqueue

* fix(HH-564): wire production SSE stream

---------

Co-authored-by: Rogee <rogee@ipao.vip>

backend/internal/handler/api/v1/contact_handler.go

@@ -289,7 +289,7 @@ func (h *ContactHandler) publishContactEvent(accountID uint, eventType string, c
 	if h.eventPublisher == nil || contact == nil {
 		return
 	}
-	h.eventPublisher.PublishEvent(accountID, eventType, serializeCRMContact(context.Background(), h.svc.DB(), contact, true))
+	publishRealtimeEvent(h.eventPublisher, accountID, eventType, serializeCRMContact(context.Background(), h.svc.DB(), contact, true))
 }
 
 // @Summary Delete a contact