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/api/main.py

@@ -0,0 +1,94 @@
+"""FastAPI 入口 + 启动钩子。"""
+from __future__ import annotations
+
+import json
+import os
+import sys
+from pathlib import Path
+
+# 确保项目根在 sys.path
+_PROJECT_ROOT = Path(__file__).resolve().parent.parent.parent
+if str(_PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(_PROJECT_ROOT))
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.core.config import settings
+from app.core.utils.logging import get_logger, setup_logging
+from app.api.routes import health, sync, datasources, schedule
+
+setup_logging()
+logger = get_logger("api")
+
+app = FastAPI(
+    title="Market Data Sync API",
+    version="0.1.0",
+    description="股票市场数据定时同步与管理",
+)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(health.router)
+app.include_router(sync.router)
+app.include_router(datasources.router)
+app.include_router(schedule.router)
+
+
+# ── 启动钩子 ──────────────────────────────────────────────────────────
+
+
+@app.on_event("startup")
+def _startup():
+    logger.info("[startup] market_data_sync 启动")
+
+    # 1. 注册数据源
+    from app.core.datasource.registry import build_default_registry
+    from app.core.datasource.base import registry
+    build_default_registry()
+    logger.info(f"[startup] 已注册 {len(registry.all())} 个数据源")
+
+    # 2. seed 数据源定义到 config 表
+    from app.core.datasource.registry import seed_datasource_configs
+    seed_datasource_configs()
+
+    # 3. seed 默认数据集注册
+    from app.core.sync.registry import seed_sync_registry
+    seed_sync_registry()
+
+    # 4. 启动时恢复卡死的 sync 任务
+    from app.core.sync.registry import recover_interrupted_syncs
+    n = recover_interrupted_syncs()
+    if n > 0:
+        logger.warning(f"[startup] 恢复了 {n} 个中断的同步任务")
+
+    # 5. seed 节假日
+    from app.core.db import ops as db_ops
+    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",
+        )
+
+    # 6. seed 默认计划任务
+    if settings.scheduler_auto_seed:
+        from app.core.scheduler.scheduler import seed_schedule_configs
+        seed_schedule_configs()
+
+    # 7. 注册 sync job + 启动调度器
+    from app.core.scheduler.scheduler import register_sync_jobs, start_scheduler
+    register_sync_jobs()
+    start_scheduler()
+
+    # 8. 启动数据源健康监控
+    from app.core.datasource.registry import start_health_monitor
+    start_health_monitor()
+
+    logger.info("[startup] 完成")