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/scheduler.py

@@ -49,6 +49,7 @@ class Scheduler:
             "eod_a": self._eod_a,
             "eod_b": self._eod_b,
             "eod_retry": self._eod_retry,
+            "stocks_refresh": self._stocks_refresh,
             "cleanup": self._cleanup,
             "backup": self._backup,
             "history_backfill": self._history_backfill,
@@ -89,6 +90,8 @@ class Scheduler:
             ("cleanup", time(0, 30)),
             ("backup", time(0, 40)),
         ]
+        for refresh_at in self.pipeline.settings.stocks_refresh_times:
+            plan.append(("stocks_refresh", _hhmm(refresh_at)))
         open_day = is_open_day(self.db, day)
         for job_id, at in plan:
             if current < at:
@@ -96,7 +99,7 @@ class Scheduler:
             key = (job_id, day, at.strftime("%H%M"))
             if key in self._fired:
                 continue
-            if job_id in {"eod_a", "eod_b"} and not open_day:
+            if job_id in {"eod_a", "eod_b", "stocks_refresh"} and not open_day:
                 self._fired.add(key)
                 continue
             self._fired.add(key)
@@ -107,7 +110,7 @@ class Scheduler:
             try:
                 self.run_job(job_id, day)
             except Exception:
-                if job_id not in {"eod_a", "eod_b"}:
+                if job_id not in {"eod_a", "eod_b", "stocks_refresh"}:
                     raise
                 # Keep the tick alive; evening retries take over.
                 LOGGER.exception("scheduled job %s failed for %s", job_id, day)
@@ -317,6 +320,9 @@ class Scheduler:
     def _eod_retry(self, trade_date: str) -> dict[str, Any]:
         return self.pipeline.run_eod_missing(trade_date)
 
+    def _stocks_refresh(self, trade_date: str) -> dict[str, Any]:
+        return self.pipeline.refresh_stocks(trade_date)
+
     def _history_backfill(self, trade_date: str) -> dict[str, Any]:
         return self.pipeline.backfill_history(trade_date)