feat：简化部分代码

app/core/exceptions.py

@@ -10,7 +10,7 @@ from openai import APIError, APITimeoutError
 from starlette.exceptions import HTTPException
 
 from app.common.response import error_content
-from app.exceptions import AppError, DecisionError, ImportProcessError
+from app.exceptions import AppError, DecisionError
 
 
 class BizException(AppError):
@@ -58,22 +58,14 @@ async def handle_unexpected_exception(
 
     exc._logged_by_api = True
 
-    # 节点包装异常时沿原始原因查找，区分上游服务故障与内部错误
-    cause = exc
-    while isinstance(cause, ImportProcessError):
-        nested = cause.cause or cause.__cause__
-        if nested is None:
-            break
-        cause = nested
-    if isinstance(cause, APITimeoutError) or (
-        isinstance(cause, DecisionError) and cause.kind == "timeout"
+    if isinstance(exc, APITimeoutError) or (
+        isinstance(exc, DecisionError) and exc.kind == "timeout"
     ):
         return JSONResponse(
             status_code=504, content=error_content(504, "模型服务请求超时")
         )
-    if isinstance(cause, APIError) or (
-        isinstance(cause, DecisionError)
-        and cause.kind not in {"configuration", "closed"}
+    if isinstance(exc, APIError) or (
+        isinstance(exc, DecisionError) and exc.kind != "configuration"
     ):
         return JSONResponse(
             status_code=502, content=error_content(502, "模型服务调用失败")