feat: 引入 Loguru

app/observability/tracing.py

@@ -6,16 +6,15 @@
 
 from __future__ import annotations
 
-import logging
 import os
 from asyncio import CancelledError
 from collections.abc import Iterator
 from contextlib import contextmanager
 from typing import Any
 
-from app.config import settings
+from loguru import logger
 
-logger = logging.getLogger("app.observability")
+from app.config import settings
 
 # 面板 Trace Name 列用的稳定名字，不要拼 thread_id 或用户原文
 TRACE_NAME = "screen-instruct"
@@ -52,8 +51,8 @@ def flush_tracing() -> None:
         return
     try:
         client.flush()
-    except Exception:
-        logger.warning("Langfuse flush 失败", exc_info=True)
+    except Exception as exc:  # noqa: BLE001 追踪故障不阻断业务
+        logger.opt(exception=exc).warning("Langfuse flush 失败")
 
 
 async def ainvoke_screen(
@@ -232,9 +231,9 @@ def _ensure_client() -> Any:
 
     try:
         client = Langfuse()
-    except Exception:
+    except Exception as exc:  # noqa: BLE001 追踪故障不阻断业务
         _unavailable = True
-        logger.warning("Langfuse 不可用，本进程跳过追踪", exc_info=True)
+        logger.opt(exception=exc).warning("Langfuse 不可用，本进程跳过追踪")
         return None
     _client = client
     return client