rebuild(stage-8): deliver market insight workspaces

next/backend/data/gateway.py

@@ -12,6 +12,7 @@ from backend.data.contracts import (
     DataUsage,
     MarketEntity,
     ObservationMetadata,
+    ProviderResult,
     SnapshotState,
     TradeContext,
 )
@@ -114,6 +115,39 @@ class DataGateway:
         self._policy.assert_allowed(provider.source, DataUsage.CALCULATION)
         return provider.snapshot_inputs(trade_date, previous_trade_date)
 
+    def trading_dates(self, through: str, limit: int = 2) -> tuple[str, ...]:
+        requested = _date(through)
+        with self._database.read() as connection:
+            return self._repository.open_dates(connection, requested, limit)
+
+    def stock_directory(self) -> dict[str, dict[str, Any]]:
+        with self._database.read() as connection:
+            rows = self._repository.stock_directory(connection)
+        return {str(row["identifier"]): dict(row) for row in rows}
+
+    def insight_inputs(
+        self,
+        kind: str,
+        trade_date: str,
+        previous_trade_date: str = "",
+        identifier: str = "",
+    ) -> dict[str, Any]:
+        provider = self._provider(DataSource.TUSHARE)
+        self._policy.assert_allowed(provider.source, DataUsage.CALCULATION)
+        return provider.market_insight(kind, trade_date, previous_trade_date, identifier)
+
+    def dynamic_auction(
+        self, identifiers: tuple[str, ...], start_time: str, end_time: str
+    ) -> ProviderResult:
+        if not identifiers:
+            raise MarketDataUnavailable("动态竞价候选范围为空")
+        provider = self._provider(DataSource.IFIND)
+        self._policy.assert_allowed(provider.source, DataUsage.CALCULATION)
+        result = provider.realtime_snapshots(identifiers, start_time, end_time)
+        if not result.rows:
+            raise MarketDataUnavailable("当前动态竞价快照暂不可用")
+        return result
+
     def sector_members(
         self, trade_date: str, sector_name: str, representative: str
     ) -> dict[str, Any]: