W16: close CRITICAL/HIGH findings, integrate metadata gate, complete audit summaries (W16.1-W16.6)

- W16.1 (曹武): F-11.7-1 CLOSED — confirmed W12.4 fix, corrupt binary eliminated
- W16.2 (孙宇): F-11.1-1 FIXED — context_plugin.cpp try/catch on set_max_tokens + on_shutdown
- W16.3 (陈风): F-11.1-2 CLOSED — confirmed W12.1 fix, strdup OOM protection already in place
- W16.4 (胡桐): Integrate check_agents_metadata into refresh_status.py as pre-gate (error→exit 1)
- W16.5 (周岩): Add Findings Summary to W13.3 network audit, register 3 findings
- W16.6 (赵码): Add Findings Summary to W13.1+W13.2 AI audits, register 8 findings (4 already W14-fixed)

Build 0 error, ctest 4/4 pass, metadata check 0 error 0 warning.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

agents/engineer-chen/profile.md

@@ -58,5 +58,14 @@ performance_log:
       - "服务注册: on_init 内注册正确，但未检查 register_service 返回值 (重复注册返回 -2 被忽略)"
       - "评级: C (无跨 DLL 堆违规但代码重复 + 双 store 架构 + dangling pointer 需修复)"
       - "输出: agents/audits/W11.2-config-audit.md"
+  - date: 2026-05-27
+    event: "W16.3 - 修复 F-11.1-2 strdup 返回值未检查 OOM 静默失败+泄漏"
+    rating: success
+    details:
+      - "审计: context_plugin.cpp 所有 4 处 g_host->strdup 调用已含 nullptr 检查 (W12.1 strdup_message_fields L125-149)"
+      - "OOM 回滚: free_msg_strs 逐字段释放 + 调用方清理已分配消息数组 + g_host->free out 数组"
+      - "跨 DLL 堆: 全部使用 g_host->strdup (符合 plugin-abi.md §3)，无 std::strdup"
+      - "编译: cmake --build build --config Release → 0 error"
+      - "测试: ctest → 4/4 pass (smoke + host-api + event-bus + service-registry)"
 current_groups: []
 ---