tambah param model untuk translate

app.py

@@ -63,7 +63,7 @@ def chat_endpoint(req: ChatRequest):
 @app.post("/translate", response_model=TranslateResponse)
 def translate_endpoint(req: TranslateRequest):
     try:
-        result = translate(req.text, req.direction)
+        result = translate(req.text, req.direction, req.model)
         
         return TranslateResponse(
             translation=result,