refactor: 存储层迁移DuckDB + 模块重构

- 存储层重构: HDF5 → DuckDB（UPSERT模式、线程安全存储）
- Sync类迁移: DataSync从sync.py迁移到api_daily.py（职责分离）
- 模型模块重构: src/models → src/pipeline（更清晰的命名）
- 新增因子模块: factors/momentum (MA、收益率排名)、factors/financial
- 新增API接口: api_namechange、api_bak_basic
- 新增训练入口: training模块（main.py、pipeline配置）
- 工具函数统一: get_today_date等移至utils.py
- 文档更新: AGENTS.md添加架构变更历史

src/data/api_wrappers/__init__.py

@@ -7,15 +7,21 @@ Available APIs:
     - api_daily: Daily market data (日线行情)
     - api_stock_basic: Stock basic information (股票基本信息)
     - api_trade_cal: Trading calendar (交易日历)
+    - api_namechange: Stock name change history (股票曾用名)
+    - api_bak_basic: Stock historical list (股票历史列表)
 
 Example:
-    >>> from src.data.api_wrappers import get_daily, get_stock_basic, get_trade_cal
+    >>> from src.data.api_wrappers import get_daily, get_stock_basic, get_trade_cal, get_bak_basic
+    >>> from src.data.api_wrappers import get_bak_basic, sync_bak_basic
     >>> data = get_daily('000001.SZ', start_date='20240101', end_date='20240131')
     >>> stocks = get_stock_basic()
     >>> calendar = get_trade_cal('20240101', '20240131')
+    >>> bak_basic = get_bak_basic(trade_date='20240101')
 """
 
-from src.data.api_wrappers.api_daily import get_daily
+from src.data.api_wrappers.api_daily import get_daily, sync_daily, preview_daily_sync, DailySync
+from src.data.api_wrappers.api_bak_basic import get_bak_basic, sync_bak_basic
+from src.data.api_wrappers.api_namechange import get_namechange, sync_namechange
 from src.data.api_wrappers.api_stock_basic import get_stock_basic, sync_all_stocks
 from src.data.api_wrappers.api_trade_cal import (
     get_trade_cal,
@@ -28,6 +34,15 @@ from src.data.api_wrappers.api_trade_cal import (
 __all__ = [
     # Daily market data
     "get_daily",
+    "sync_daily",
+    "preview_daily_sync",
+    "DailySync",
+    # Historical stock list
+    "get_bak_basic",
+    "sync_bak_basic",
+    # Namechange
+    "get_namechange",
+    "sync_namechange",
     # Stock basic information
     "get_stock_basic",
     "sync_all_stocks",