feat: 集成code-review skill到项目

- 项目级 skill: .claude/skills/code-review/ (398行SKILL.md + 参考文件)
- 自动触发: AI修改.py/.cbl/.cpy/.lark后自动review
- CLAUDE.md: 定义触发规则、review流程、严重级别
- .code-review.yaml: tier=standard, 高风险模块配置

效果: clone即用, 每次代码变更后自动审查, 防止低质量代码入库
Co-Authored-By: Claude <noreply@anthropic.com>

.claude/skills/code-review/references/manual-review/distributed-lock.md

@@ -0,0 +1,23 @@
+# Distributed Lock — Manual Review Checklist
+
+## Timeout Strategy
+- [ ] Lock TTL defined and justified (not arbitrary)
+- [ ] TTL exceeds maximum expected operation time
+- [ ] Watchdog/refresh mechanism if operation may exceed TTL
+- [ ] Lock auto-releases on process crash (not permanent deadlock)
+
+## Release Mechanism
+- [ ] Lock released by the same instance that acquired it (ownership check)
+- [ ] Release is atomic (check-then-release is not atomic — use Lua script or compare-and-delete)
+- [ ] Lock release in finally/defer block guaranteed to execute
+
+## Retry Strategy
+- [ ] Retry with exponential backoff, not infinite retry
+- [ ] Maximum retry count or timeout defined
+- [ ] Failed lock acquisition returns clear error (not silent fallback)
+
+## Granularity & Deadlock
+- [ ] Lock key granularity appropriate (per-resource, not global)
+- [ ] Multiple lock acquisition order consistent (prevents deadlock)
+- [ ] No nested locks on same resource
+- [ ] Lock contention monitored/metrics available