first commit

app/bot/middlewares/services.py

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+from typing import Any, Awaitable, Callable
+
+from aiogram import BaseMiddleware
+from aiogram.types import TelegramObject
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.repositories.user import UserRepository
+from app.services.referral_service import ReferralService
+from app.services.user_service import UserService
+
+
+class ServicesMiddleware(BaseMiddleware):
+    """Builds application services from the request-scoped session (dependency injection)."""
+
+    async def __call__(
+        self,
+        handler: Callable[[TelegramObject, dict[str, Any]], Awaitable[Any]],
+        event: TelegramObject,
+        data: dict[str, Any],
+    ) -> Any:
+        session: AsyncSession = data["session"]
+        users = UserRepository(session)
+        referrals = ReferralService(users)
+        data["user_service"] = UserService(users, referrals)
+        return await handler(event, data)