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/data-migration.md

@@ -0,0 +1,25 @@
+# Data Migration — Manual Review Checklist
+
+## Rollback Plan
+- [ ] Rollback script tested and ready before migration
+- [ ] Rollback handles partial migration state
+- [ ] Rollback is idempotent
+- [ ] Database backup taken before migration
+
+## Consistency Verification
+- [ ] Migration verification query defined (row count, checksum, sample compare)
+- [ ] Old and new data validated before old table dropped
+- [ ] Foreign key constraints preserved
+- [ ] Indexes migrated or recreated
+
+## Large Table Strategy
+- [ ] Batch processing with configurable batch size
+- [ ] Migration doesn't lock table for extended period
+- [ ] Progress tracking (how many rows processed)
+- [ ] Rate limiting to avoid DB overload
+- [ ] Dry-run mode tested before actual migration
+
+## Idempotency
+- [ ] Migration script is idempotent (can be re-run safely)
+- [ ] Uses INSERT ON CONFLICT / INSERT IGNORE / MERGE as appropriate
+- [ ] Migration tracks what has been processed (checkpoint table)