q_a优化，提示词优化

util/utils.py

@@ -1,7 +1,8 @@
+import logging
 from typing import Optional
 
 from orjson import orjson
-
+logger = logging.getLogger(__name__)
 keywords = {
     # "gender":{"1":"男","2":"女"},
     "person_status":{"1":"草稿","2":"审批中","3":"制卡中","4":"已入库","5":"停用"},
@@ -43,7 +44,8 @@ def extract_nested_json(text):
     stack = []
     start_index = -1
     results = []
-
+    if not text:
+        logger.warning("extract_nested_json: text is empty")
     for i, char in enumerate(text):
         if char in '{[':
             if not stack:  # 记录起始位置