Add Engine authentication services and builders

Data/Engine/services/auth/__init__.py

@@ -0,0 +1,20 @@
+"""Authentication services for the Borealis Engine."""
+
+from __future__ import annotations
+
+from .device_auth_service import DeviceAuthService, DeviceRecord
+from .token_service import (
+    RefreshTokenRecord,
+    TokenRefreshError,
+    TokenRefreshErrorCode,
+    TokenService,
+)
+
+__all__ = [
+    "DeviceAuthService",
+    "DeviceRecord",
+    "RefreshTokenRecord",
+    "TokenRefreshError",
+    "TokenRefreshErrorCode",
+    "TokenService",
+]