Publish King campaign report (manual update)

update_report_data.py

@@ -458,6 +458,19 @@ def build_payload(now):
     except Exception as error:
         print(f"  Target 读取失败（{error}）；请把该表共享给服务账号或开放链接查看")
     sands = load_sands_cost()
+    # 判断 Cost 是否滞后于数据周期
+    if sands and sands.get("fetched_at"):
+        try:
+            fetched = datetime.fromisoformat(sands["fetched_at"]).date()
+        except ValueError:
+            fetched = None
+        if fetched:
+            lag = (end_date - fetched).days + 1
+            sands["fetched_date"] = fetched.isoformat()
+            sands["lag_days"] = max(0, lag)
+            sands["stale"] = lag > 0
+            if sands["stale"]:
+                print(f"  警告：Sands Cost 抓取于 {fetched}，可能未覆盖到 {end_date}，滞后约 {lag} 天")
 
     # 消耗表里可能出现 Cost_Client 未覆盖的 Campaign，一并纳入
     for key, _day in wide_costs: