Move to swap failed, invoice expired state immediately when invoice expired

[armurbalda]

Currently one sees this state when on-chain tx is not confirmed yet but invoice already expired: Only realized this because of a user report, couldn't "download refund file" because button is (correctly) not shown in this state. Desired behavior: backend should check invoice expiry and move to swap failed state immediately when invoice expires

@dni test if above scenario is fixed and web app immediately moves and shows "download refund file" button