migration: preserve market insights slice

app/backend/features/market/service.py

@@ -14,6 +14,7 @@ from backend.bootstrap.config import (
 from backend.data.providers.ifind_client import IfindError
 from backend.data.providers.tushare_client import TushareClient, TushareError
 from backend.features.market.charts import ChartDataError
+from backend.features.market.insights import MarketInsightsService
 from backend.features.sentiment.engine import SENTIMENT_ENGINE_VERSION
 
 
@@ -36,6 +37,14 @@ THS_SEARCH_TYPES = {
 
 
 class MarketServiceMixin:
+    def _market_insights(self) -> MarketInsightsService:
+        if not self.configured:
+            raise ValueError("行情数据尚未配置。")
+        return MarketInsightsService(
+            self.database,
+            self._tushare_client(),
+            ifind=self.ifind,
+        )
     def _tushare_client(self) -> TushareClient:
         gateway = getattr(self, "data_gateway", None)
         if gateway is not None: