fix(HEL-494): 切断网站生产装配外源直连，iFinD 与实时观察改走中枢

生产 gateway 不再实例化 iFinD、东财图和免费实时聚合器；问财与竞价快照作为中枢内部数据源。全站阻断外源测试覆盖日K、报价、图表、问财和竞价快照。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

tests/test_ifind_features.py

@@ -6,7 +6,7 @@ from datetime import date, datetime, timedelta, timezone
 from pathlib import Path
 from unittest.mock import patch
 
-from backend.features.market.charts import EastmoneyChartClient, MarketChartClient
+from backend.features.market.charts import MarketChartClient
 from database import ReviewDatabase
 from backend.features.market.insights import MarketInsightsService
 from server import DashboardService
@@ -166,7 +166,7 @@ class IfindFeatureTests(unittest.TestCase):
                 },
             ]
         )
-        client = MarketChartClient(FakeIfind(), EastmoneyChartClient(), hub)
+        client = MarketChartClient(hub)
         rows = client.stock_daily("000001", "20260728")
         self.assertEqual(rows[-1]["trade_date"], "2026-07-28")
         self.assertAlmostEqual(rows[-1]["change"], 2.9412, places=4)
@@ -185,7 +185,7 @@ class IfindFeatureTests(unittest.TestCase):
                 }
             ]
         )
-        client = MarketChartClient(FakeIfindStalePreopen(), EastmoneyChartClient(), hub)
+        client = MarketChartClient(hub)
         with patch("backend.features.market.charts.datetime", FixedPreopenDatetime):
             rows = client.stock_daily("000001", "20260729")