docs(changelog): 8807 微信商户对账逐笔账单记录出参新增 appid 字段（PR #8808）

changelogs-v2/2026-10/09_8807_wx-bill-record加appid-修改接口-管理后台.md

@@ -7,6 +7,7 @@ author: "yst"
 change_type: "修改接口"
 backend_status: "merged"
 gateway_status: "not_required"
+frontend_status: "pending"
 frontend_owner: ""
 frontend_ref: ""
 target_release: "v2.1"