Add spin session functionality and update game mechanics

- Introduced a new `spin_sessions` table to track user spin activities.
- Updated the API to include a new endpoint for spinning games, allowing users to place bets and specify spin counts.
- Enhanced game information structure and added validation for bets and spin counts.
- Implemented the `Forest Fortune` slot game mechanics, including payline evaluation and scatter functionality.
- Updated dependencies in `pyproject.toml` for development and added `httpx` for HTTP requests.
- Added unit tests for the new slot mechanics and API endpoints to ensure functionality and reliability.

app/main.py

@@ -6,7 +6,7 @@ from fastapi.middleware.cors import CORSMiddleware
 from app.api.routes import router
 from app.core.config import get_settings
 from app.core.database import Base, engine
-from app.models import Deposit, User  # noqa: F401
+from app.models import Deposit, SpinSession, User  # noqa: F401
 
 
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