Fix handling of expired team registration sessions

A missing team registration should be treated as a valid expiration
case, returning True instead of False to properly clean up sessions.

tournaments/services/payment_service.py

@@ -507,7 +507,7 @@ class PaymentService:
 
         except TeamRegistration.DoesNotExist:
             print(f"[EXPIRED SESSION] Team registration {team_registration_id} not found")
-            return False
+            return True
         except Exception as e:
             print(f"[EXPIRED SESSION] Error processing team registration: {str(e)}")
             return False