chore: 重构前基线 — 9 个 sync task 全部 ok + akshare 移除 + mairui 资金流接入

状态：
- 9 个 sync task（stock_basic / kline_daily / kline_index / kline_5min /
  moneyflow / industry_sector / sector_features / share_snapshot / market_regime）
- 数据源：baostock + mairui + 雪球(pysnowball) + 新浪（4 个）
- 项目级约束：永远不用 akshare（已落实）
- kline_5min 改用 DB 快照统一全量/增量逻辑
- 零后端 Chrome 扩展 xueqiu_sync（独立项目）

app/entrypoints/worker.py

@@ -0,0 +1,73 @@
+"""纯 worker 模式（无 web）— 启动调度器 + 健康监控。
+
+用法：python -m app.worker
+"""
+from __future__ import annotations
+
+import json
+import sys
+import time
+from pathlib import Path
+
+_PROJECT_ROOT = Path(__file__).resolve().parent.parent
+if str(_PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(_PROJECT_ROOT))
+
+from app.core.config import settings
+from app.core.db import ops as db_ops
+from app.core.utils.logging import get_logger, setup_logging
+
+setup_logging()
+logger = get_logger("worker")
+
+
+def main():
+    logger.info("[worker] market_data_sync worker 启动")
+
+    # 1. 注册数据源 + seed config
+    from app.core.datasource.registry import build_default_registry, seed_datasource_configs
+    build_default_registry()
+    seed_datasource_configs()
+
+    # 2. seed sync registry + 恢复卡死任务
+    from app.core.sync.registry import recover_interrupted_syncs, seed_sync_registry
+    seed_sync_registry()
+    n = recover_interrupted_syncs()
+    if n > 0:
+        logger.warning(f"[worker] 恢复了 {n} 个中断的同步任务")
+
+    # 3. seed 节假日
+    if settings.holidays_list:
+        db_ops.upsert_config(
+            "trading_calendar_holidays",
+            json.dumps(settings.holidays_list, ensure_ascii=False),
+            category="general",
+            description="A 股休市日",
+        )
+
+    # 4. seed 默认计划任务
+    if settings.scheduler_auto_seed:
+        from app.core.scheduler.scheduler import seed_schedule_configs
+        seed_schedule_configs()
+
+    # 5. 注册 sync job + 启动调度器 + 健康监控
+    from app.core.scheduler.scheduler import register_sync_jobs, start_scheduler
+    from app.core.datasource.registry import start_health_monitor
+    register_sync_jobs()
+    start_scheduler()
+    start_health_monitor()
+
+    logger.info("[worker] 已启动调度器 + 健康监控，按 Ctrl+C 退出")
+
+    try:
+        while True:
+            time.sleep(60)
+    except KeyboardInterrupt:
+        logger.info("[worker] 收到 SIGINT，退出")
+        from app.core.scheduler.scheduler import stop_scheduler
+        stop_scheduler()
+        sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()