feat(HEL-457): 估值字段级质量门、股票主档每日发布和资金流历史回补

- field_gates 按数据集配置关键字段非空率下限/非有限比例/相对上一批次的塌陷保护，
  字段大面积为空的批次拒发并保留上一正式批次，可读失败原因入 batches.error
- 股票主档交易日 20:00/23:10 自动刷新并发布版本化快照（eod_stocks + publications），
  覆盖新上市/简称变化/N前缀摘除；/v1/stocks 携带 batch_id/published_at，无变化跳过
- moneyflow 历史回补（默认 60 交易日，跳过已发布日期）；未发布点查返回
  available_from/available_to 与 history_not_backfilled 标记，缺失不再静默
- eod-refresh 新增 --force --dataset 安全重发（仍走全部质量门，上一批次可回滚）
- 保持 HEL-435 盘后重试机制；新增 22 项测试覆盖字段拒发/正常通过/旧批保留/
  主档新增改名/资金流覆盖/重复执行幂等

Co-authored-by: multica-agent <github@multica.ai>

xiaobai-datahub/datahub/admin_api.py

@@ -84,12 +84,14 @@ class AdminAPI:
 
     def jobs(self) -> dict[str, Any]:
         runs = self.db.fetchall("SELECT * FROM job_runs ORDER BY id DESC LIMIT 100")
+        stocks_times = "/".join(self.pipeline.settings.stocks_refresh_times) or "20:00"
         return {
             "jobs": [
                 {"id": "precheck", "at": "08:45", "title": "盘前预检"},
                 {"id": "eod_a", "at": "15:05", "title": "盘后批 A daily/valuation/moneyflow/auction"},
                 {"id": "eod_b", "at": "15:10", "title": "盘后批 B index_daily"},
                 {"id": "eod_retry", "at": "15:15-23:30", "title": "盘后未出数自动重试（每 30 分钟，成功即停）"},
+                {"id": "stocks_refresh", "at": stocks_times, "title": "股票主档刷新与正式发布（新上市/更名，无变化跳过）"},
                 {"id": "history_backfill", "at": "manual", "title": "回补历史日历与指数日 K"},
                 {"id": "cleanup", "at": "00:30", "title": "清理 staging / 日志"},
                 {"id": "backup", "at": "00:40", "title": "SQLite 备份"},