From ddee8d54609768f9e6731f70b6ba1780a96c4d2c Mon Sep 17 00:00:00 2001
From: weichen <weichen@home.local>
Date: Tue, 13 Oct 2026 07:12:30 +0000
Subject: [PATCH] Bump backend pin to embedded core sync 15566f9a
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Why: Backend PR 194（嵌套 core pin 同步）合入后的 Dev 顶层组合 bump，闭合三层全等。
Evidence: check-pins 通过；组合验证由本 PR CI 承担。
Impact: gitlink 一枚。
---
 modules/backend | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/backend b/modules/backend
index 31a6b326..15566f9a 160000
--- a/modules/backend
+++ b/modules/backend
@@ -1 +1 @@
-Subproject commit 31a6b326c6e821e22891a78af9bb5860db3cd9ff
+Subproject commit 15566f9a3344ab8f6adc8262948243af0e81fd22