feat: 引入 Loguru

app/services/agent.py

@@ -3,6 +3,7 @@
 from uuid import uuid4
 
 from langgraph.types import Command
+from loguru import logger
 
 from app.core.exceptions import BizException
 from app.observability.tracing import ainvoke_screen
@@ -68,10 +69,26 @@ class AgentService:
             self._active.discard(thread_id)
 
     async def _execute(self, thread_id, payload, session_id) -> AgentResult:
-        state = await ainvoke_screen(
-            self.graph, payload, thread_id=thread_id, session_id=session_id
-        )
+        # 上下文只作用于当前异步任务，节点自动继承任务标识
+        with logger.contextualize(thread_id=thread_id):
+            logger.info("任务执行开始")
+            try:
+                state = await ainvoke_screen(
+                    self.graph, payload, thread_id=thread_id, session_id=session_id
+                )
+            except Exception as exc:
+                # API 异常处理发生在上下文退出后，保留任务标识用于定位
+                exc._agent_thread_id = thread_id
+                raise
+            logger.info(
+                "任务执行结束，状态 {}",
+                "waiting_for_input"
+                if state.get("__interrupt__")
+                else state.get("status"),
+            )
+
         waiting = bool(state.get("__interrupt__"))
+
         # 只交付校验通过的完整动作批次，失败草稿留在后端
         return AgentResult(
             thread_id=thread_id,