fix: bind applyFormatting method in processMessages to maintain context

src/api/integrations/chatbot/typebot/services/typebot.service.ts

@@ -186,7 +186,7 @@ export class TypebotService extends BaseChatbotService<TypebotModel, any> {
       messages,
       input,
       clientSideActions,
-      this.applyFormatting,
+      this.applyFormatting.bind(this),
       this.prismaRepository,
     ).catch((err) => {
       console.error('Erro ao processar mensagens:', err);