refactor: 代码结构优化与常量化

将日志系统从 app/logger/ 移至 app/log/ 目录
将路由配置从 routers.py 重命名为 routes.py
将硬编码配置值移至 constants.py 中的默认常量
统一代码格式和导入排序
优化函数参数对齐方式

app/handler/retry_handler.py

@@ -1,10 +1,11 @@
 # app/services/chat/retry_handler.py
 
-from typing import TypeVar, Callable
 from functools import wraps
-from app.logger.logger import get_retry_logger
+from typing import Callable, TypeVar
 
-T = TypeVar('T')
+from app.log.logger import get_retry_logger
+
+T = TypeVar("T")
 logger = get_retry_logger()
 
 
@@ -25,17 +26,21 @@ class RetryHandler:
                     return await func(*args, **kwargs)
                 except Exception as e:
                     last_exception = e
-                    logger.warning(f"API call failed with error: {str(e)}. Attempt {attempt + 1} of {self.max_retries}")
+                    logger.warning(
+                        f"API call failed with error: {str(e)}. Attempt {attempt + 1} of {self.max_retries}"
+                    )
 
                     # 从函数参数中获取 key_manager
-                    key_manager = kwargs.get('key_manager')
+                    key_manager = kwargs.get("key_manager")
                     if key_manager:
                         old_key = kwargs.get(self.key_arg)
                         new_key = await key_manager.handle_api_failure(old_key)
                         kwargs[self.key_arg] = new_key
                         logger.info(f"Switched to new API key: {new_key}")
 
-            logger.error(f"All retry attempts failed, raising final exception: {str(last_exception)}")
+            logger.error(
+                f"All retry attempts failed, raising final exception: {str(last_exception)}"
+            )
             raise last_exception
 
         return wrapper