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>

backend/bootstrap/container.py

@@ -13,8 +13,8 @@ from backend.features.screener.engine import ScreenerEngine
 from backend.features.screener.tracking import StrategyTrackingService
 from backend.jobs import InProcessJobRunner, JobRegistry, SQLiteJobRunRepository
 from database import ReviewDatabase
-from backend.data.providers.ifind_client import IfindHttpClient
-from backend.data.realtime import WebRealtimeAggregator
+from backend.data.datahub.ifind_proxy import HubIfindProxy
+from backend.data.datahub.realtime_proxy import HubRealtimeProxy
 from backend.features.market.charts import MarketChartClient
 
 
@@ -23,13 +23,13 @@ class ApplicationContainer:
     database: ReviewDatabase
     repositories: RepositoryBundle
     data_gateway: DataGateway
-    ifind: IfindHttpClient
+    ifind: HubIfindProxy
     screener: ScreenerEngine
     strategy_tracking: StrategyTrackingService
     alert_service: AlertService
     trade_journal: TradeJournalService
     mentor_skills: MentorSkillRegistry
-    realtime_aggregator: WebRealtimeAggregator
+    realtime_aggregator: HubRealtimeProxy
     chart_data: MarketChartClient
     jobs: InProcessJobRunner