Implement background scanner

for now just outputs uid as configured by test.py

app/main.py

@@ -4,8 +4,9 @@ from contextlib import asynccontextmanager
 from dotenv import load_dotenv
 
 from .controllers import userManager, cardManager, groupManager, aaManager, doorManager
-from .services.database import create_db_and_tables
+from .services.database import create_db_and_tables, get_session
 from .services.auth import token_router, create_first_user
+from app.services.scanner import BackgroundScanner
 
 oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
 
@@ -15,7 +16,10 @@ async def lifespan(app: FastAPI):
     create_db_and_tables()
     create_first_user()
     print("Database created and tables initialized.")
+    scanner = BackgroundScanner(db=get_session())
+    scanner.start()
     yield
+    scanner.stop()
 
 app = FastAPI(lifespan=lifespan)