chore(changelog): 补齐 17 条消费闭环 frontmatter 回写

11 条有业务交付改判 verified(#6397/6903/6904/6905/6950/6979/6986/7013/7029/7036/7066,owner=mmg+对应业务 commit ref+交付日 verified_at);
6 条实证零改动改判 not_required(#6014/6016/6140/6938/6842/7087,仅翻 frontend_status 不填 owner/ref)。
#5935 挂起待后端补字段,保持 pending 不动。sync-log 均已记账。

changelogs-v2/2026-09/06_6842_供应商合同修改与删除接口-修改接口-管理后台.md

@@ -7,7 +7,7 @@ author: "lc(GIT)"
 change_type: "修改接口"
 backend_status: "deployed"
 gateway_status: "verified"
-frontend_status: "pending"
+frontend_status: "not_required"
 frontend_owner: ""
 frontend_ref: ""
 target_release: ""