feat: 接入langfuse

app/clients/decision.py

@@ -77,34 +77,41 @@ class DecisionEngine:
             | {"type": question.type}
             for name, question in request.decisions.items()
         }
-        try:
-            response = await client.system_one(
-                state=request.state,
-                questions=questions,
-                model=request.model,
-                extra_body=request.extra_body or None,
-            )
-        except TypeSafeAPIResponseValidationError as error:
-            raise DecisionError(
-                "Jev 返回的数据格式无效",
-                kind="response_validation",
-                status=error.status,
-                request_id=error.request_id,
-            ) from error
-        except TypeSafeAPIError as error:
-            raise DecisionError(
-                f"Jev 请求失败（HTTP {error.status}）",
-                kind="api",
-                status=error.status,
-                request_id=error.request_id,
-            ) from error
-        except TypeSafeAPITimeoutError as error:
-            raise DecisionError("Jev 请求超时", kind="timeout") from error
-        except TypeSafeAPIConnectionError as error:
-            raise DecisionError("无法连接 Jev 服务", kind="connection") from error
-        except TypeSafeError as error:
-            raise DecisionError("Jev SDK 调用失败", kind="sdk") from error
-        return self._parse_response(request, response)
+        from app.observability.tracing import observe_decision, record_decision
+
+        # 观测包在请求外面：成功才记结果，失败仍抛原来的 DecisionError
+        # generation 为 None 时 record_decision 什么都不做
+        with observe_decision(request) as generation:
+            try:
+                response = await client.system_one(
+                    state=request.state,
+                    questions=questions,
+                    model=request.model,
+                    extra_body=request.extra_body or None,
+                )
+            except TypeSafeAPIResponseValidationError as error:
+                raise DecisionError(
+                    "Jev 返回的数据格式无效",
+                    kind="response_validation",
+                    status=error.status,
+                    request_id=error.request_id,
+                ) from error
+            except TypeSafeAPIError as error:
+                raise DecisionError(
+                    f"Jev 请求失败（HTTP {error.status}）",
+                    kind="api",
+                    status=error.status,
+                    request_id=error.request_id,
+                ) from error
+            except TypeSafeAPITimeoutError as error:
+                raise DecisionError("Jev 请求超时", kind="timeout") from error
+            except TypeSafeAPIConnectionError as error:
+                raise DecisionError("无法连接 Jev 服务", kind="connection") from error
+            except TypeSafeError as error:
+                raise DecisionError("Jev SDK 调用失败", kind="sdk") from error
+            parsed = self._parse_response(request, response)
+            record_decision(generation, parsed)
+            return parsed
 
     @staticmethod
     def _parse_response(