refactor: enforce account scoped repository boundaries

backend/bootstrap/container.py

@@ -6,6 +6,7 @@ from collections.abc import Callable
 
 from alert_service import AlertService
 from backend.data import DataGateway, build_data_gateway
+from backend.database.repositories import RepositoryBundle, build_repository_bundle
 from chart_data_provider import MarketChartClient
 from database import ReviewDatabase
 from ifind_client import IfindHttpClient
@@ -19,6 +20,7 @@ from trade_journal import TradeJournalService
 @dataclass(frozen=True)
 class ApplicationContainer:
     database: ReviewDatabase
+    repositories: RepositoryBundle
     data_gateway: DataGateway
     ifind: IfindHttpClient
     screener: ScreenerEngine
@@ -38,14 +40,16 @@ def build_application_container(
     tushare_token_supplier: Callable[[], str] | None = None,
 ) -> ApplicationContainer:
     data_gateway = build_data_gateway(credentials, tushare_token_supplier)
+    repositories = build_repository_bundle(database)
     return ApplicationContainer(
         database=database,
+        repositories=repositories,
         data_gateway=data_gateway,
         ifind=data_gateway.ifind,
         screener=ScreenerEngine(database),
-        strategy_tracking=StrategyTrackingService(database),
-        alert_service=AlertService(database),
-        trade_journal=TradeJournalService(database),
+        strategy_tracking=StrategyTrackingService(repositories.strategy_tracking),
+        alert_service=AlertService(repositories.alerts),
+        trade_journal=TradeJournalService(repositories.trades),
         mentor_skills=MentorSkillRegistry(mentor_skills_dir, private_mentor_skills_dir),
         realtime_aggregator=data_gateway.realtime_observer,
         chart_data=data_gateway.chart_data,