fix: add stream routes and guarantee finalJson answer property

src/routes/chat.routes.ts

@@ -5,6 +5,8 @@ import { chatMessage, deleteChatHistory, sendThreadMessage } from '../controller
 const router = Router();
 
 router.post('/threads/:threadId/message', requireAuth, sendThreadMessage);
+router.post('/stream', requireAuth, chatMessage);
+router.post('/:caseId/stream', requireAuth, chatMessage);
 router.post('/:caseId/message', requireAuth, chatMessage);
 router.delete('/:caseId', requireAuth, deleteChatHistory);