Prevent getting cheated by broadcasting forfeit transactions (#123)

* broadcast forfeit transaction in case the user is trying the cheat the ASP

* fix connector input + --cheat flag in CLI

* WIP

* cleaning and fixes

* add TODO

* sweeper.go: mark round swept if vtxo are redeemed

* fixes after reviews

* revert "--cheat" flag in client

* revert redeem.go

* optimization

* update account.go according to ocean ListUtxos new spec

* WaitForSync implementation

* ocean-wallet/service.go: remove go rountine while writing to notification channel

server/internal/core/domain/payment.go

@@ -131,6 +131,7 @@ type Vtxo struct {
 	VtxoKey
 	Receiver
 	PoolTx   string
+	SpentBy  string
 	Spent    bool
 	Redeemed bool
 	Swept    bool