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/security-cao/profile.md

@@ -18,6 +18,14 @@ weaknesses:
   - 对功能开发节奏感知较弱，容易"挡路"
   - 偶尔过度强调低风险问题
 performance_log:
+  - date: 2026-05-27
+    event: "W16.1: 验证 F-11.7-1 (build/bin/ 损坏二进制副本) — W12.4 已彻底修复"
+    rating: done
+    detail: |
+      确认 build/dstalk-cli/dstalk-cli.exe 已删除 (W12.4 devops-hu 修复);
+      build/bin/dstalk-cli.exe 为唯一正确副本 (67584 bytes);
+      cmake --build build --config Release: 0 error; ctest: 4/4 pass。
+      更新 findings-registry.md: F-11.7-1 OPEN→CLOSED, Close Date 2026-05-27, Fix Wave W12.4, Verified By security-cao。
   - date: 2026-05-27
     event: "入职 dstalk 团队"
     rating: ongoing