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app/repositories/__init__.py

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+"""
+Repositories package - Data Access Layer
+
+Repositories handle ALL database operations. They provide a clean
+interface for services to work with data without knowing SQL/ORM details.
+"""
+from app.repositories.user_repository import UserRepository
+from app.repositories.client_repository import ClientRepository
+from app.repositories.token_repository import TokenRepository
+
+__all__ = ['UserRepository', 'ClientRepository', 'TokenRepository']