feat: 完善采购任务安全恢复 (#73)

client/src/purchase_task_service.py

@@ -164,7 +164,7 @@ class PurchaseTaskService:
                 exc.code,
                 exc.message,
                 exc.retryable,
-                exc.step or step,
+                step,
                 exc.diagnostics,
             )
         except Exception as exc:
@@ -367,9 +367,9 @@ class PurchaseTaskService:
     ) -> OutboxEventRecord:
         if code == "PURCHASE_CANCELLED":
             status = TaskStatus.CANCELLED
-        elif retryable:
-            status = TaskStatus.RETRY_WAIT
         else:
+            # 采购没有手动“重新执行”入口。即使错误属于
+            # 技术上可重试，也先留给人工判断，避免隐式重复采购。
             status = TaskStatus.MANUAL_REVIEW
         return self._repository.save_purchase_failure(
             remote_task_id,