refactor: use clean contract ID when connecting a membership with a contract

src/QUI/Memberships/Events.php

@@ -314,7 +314,7 @@ public static function onQuiqqerContractCreateFromOrder(Contract $Contract, Orde
                 $Membership     = $Memberships->getChild($ProductMembershipField->getValue());
                 $MembershipUser = $Membership->getMembershipUser($Customer->getId());
 
-                $MembershipUser->setAttribute('contractId', $Contract->getId());
+                $MembershipUser->setAttribute('contractId', $Contract->getCleanId());
                 $MembershipUser->update(false);
 
                 break;