feat(selection): 迁移知行B1选股策略

zhixing-server/src/zhixing_server/modules/selection/domain/ports.py

@@ -0,0 +1,18 @@
+"""Ports that keep selection formulas independent from storage technology."""
+
+from __future__ import annotations
+
+from datetime import date
+from typing import Protocol
+
+from .models import StockHistory
+
+
+class MarketDataReaderError(RuntimeError):
+    """A market-data adapter could not complete a read."""
+
+
+class MarketDataReader(Protocol):
+    """Read qfq history sufficient for one historical strategy evaluation."""
+
+    def load_history(self, ts_code: str, target_trade_date: date) -> StockHistory: ...