refactor: 将多个方法修改为静态方法以提高代码可读性和一致性

src/do_tool/tool_can_use/get_knowledge.py

@@ -49,8 +49,9 @@ class SearchKnowledgeTool(BaseTool):
             logger.error(f"知识库搜索工具执行失败: {str(e)}")
             return {"name": "search_knowledge", "content": f"知识库搜索失败: {str(e)}"}
 
+    @staticmethod
     def get_info_from_db(
-        self, query_embedding: list, limit: int = 1, threshold: float = 0.5, return_raw: bool = False
+            query_embedding: list, limit: int = 1, threshold: float = 0.5, return_raw: bool = False
     ) -> Union[str, list]:
         """从数据库中获取相关信息