From 48f51266560452f0c86d40b00382ebebf693e4b2 Mon Sep 17 00:00:00 2001
From: weichen <weichen@home.local>
Date: Mon, 19 Oct 2026 13:50:43 +0000
Subject: [PATCH] Bump modules/backend to 3f4b34a (Backend main with U1+U3A)
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Why: host integration step 3/8 — Dev modules/backend gitlink bump to Backend main post-merge of PR #219 (IAM U1 + U3A). This is a controlled host-side submodule bump to enable U3B/U4 consumption of the new CapabilityExplain DTO.

Evidence: Backend PR #219 merged (commit 3f4b34a); Dev verify receipts /tmp/iam-link-u1-verify-20261019.json + /tmp/iam-link-u3a-verify-20261019.json exit=0.

Impact: Backend U1+U3A available to L1's RDM/Frontend consumers; U3B can now consume CapabilityExplain from pins/agent-system-backend at the new commit.

Refs: plan revision 3 U1+U3A; PR #628; host integration per user directive (steps 1-8).
---
 modules/backend | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/backend b/modules/backend
index 4130ad78..3f4b34a5 160000
--- a/modules/backend
+++ b/modules/backend
@@ -1 +1 @@
-Subproject commit 4130ad78aebe6cd0b4157495ac1dfaaecb622bbe
+Subproject commit 3f4b34a5e845bc187b5578682d411efd31fda94d