W15: workflow improvements — EXPRESS fast-path, audit→fix closed loop, metadata self-check (W15.1-W15.3)

- W15.1 (杨帆): Add EXPRESS fast-path to §11 state machine (T17/T18, E1-E6 conditions, escalation safety valve)
- W15.2 (王测): Add §14 audit→fix closed loop — findings-registry.md, severity-driven auto-triage, CRITICAL blocking rule
- W15.3 (胡桐): Create scripts/check_agents_metadata.py (5-check: YAML parse, rating range, group/member refs, duplicate IDs)
- Fix YAML orphan bugs in 3 profiles: devops-hu, engineer-sun, security-cao (perf_log entries outside array)
- Pre-fill findings-registry.md with 10 historical findings from W11.1/W11.7 audits

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

agents/qa-wang/profile.md

@@ -36,6 +36,9 @@ performance_log:
   - date: 2026-05-27
     event: "W13.3: network_plugin.cpp 深度审计 (322行, 9维度)。发现 TLS 证书验证完全禁用 (F, CVSS 7.4) + DNS 解析无超时 (永久hang) + 缺 catch(...)。RAII/堆纪律/并发 A 级。综合 C 级"
     rating: A
+  - date: 2026-05-27
+    event: "W15.2: 设计审计→修复闭环机制。定义 findings-registry.md 格式 + OPEN→ASSIGNED→FIXED→VERIFIED→CLOSED 状态生命周期 + 4级严重度自动转化规则 + WORKFLOW.md §14 完整草案。从 W11.1/W11.7 提取 10 条历史发现初始化注册表"
+    rating: A
 current_groups:
   - grp-quality-core (组长)
 ---