feat(review): 支持多候选稿验收轮次

- 支持每轮提交 1–5 个候选稿并按指定稿验收
- 保留历史轮次只读并兼容单候选稿版本接口
- 同步 SQLite/PostgreSQL schema、迁移验证、测试与项目文档

package.json

@@ -15,6 +15,7 @@
     "db:postgres:validate": "tsx scripts/validate-postgres-migration.ts",
     "test:postgres-runtime": "tsx scripts/test-postgres-runtime.ts",
     "test:collection-status": "tsx scripts/test-sqlite-collection-status.ts",
+    "test:review-rounds": "tsx scripts/test-sqlite-review-rounds.ts",
     "dev": "concurrently \"npm run client:dev\" \"npm run server:dev\""
   },
   "dependencies": {