fix: preserve xpd purchase records in task results

web/backend/services/douyu_service.py

@@ -276,7 +276,7 @@ def sanitize_douyu_task_result(result: dict | None, task_type: str, *, include_d
     data = strip_douyu_raw_snapshots(result)
     if not isinstance(data, dict):
         return None
-    for key in (
+    removable_keys = {
         "bind_info",
         "before_bind_info",
         "bind_candidates",
@@ -287,8 +287,10 @@ def sanitize_douyu_task_result(result: dict | None, task_type: str, *, include_d
         "points_query",
         "exchange_balance_query",
         "query_act_aliases",
-        "records",
-    ):
+    }
+    if task_type != "query_xpd_purchase_records":
+        removable_keys.add("records")
+    for key in removable_keys:
         data.pop(key, None)
 
     # 和平小店任务 result 内嵌 role（含 gameOpenId 等），列表接口剥离其原始快照