优化输入文本打印逻辑，限制输出长度以提高可读性

app.py

@@ -52,7 +52,7 @@ async def predict(request: PredictRequest):
     try:
         input_text = request.text  # FastAPI 会自动解析为 PredictRequest 对象
         affected_stock_codes = request.stock_codes
-        print("Input text:", input_text)
+        print("Input text:", input_text[:200] if len(input_text) > 200 else input_text)
         print("Affected stock codes:", affected_stock_codes)
         return predict(input_text, affected_stock_codes)
     except Exception as e: