TxSignersResponse corrections
Agreeing with these Discord messages by hodr,
correcting the TxSignersResponse schemas for "out_txs" (string -> Tx) and "actions" (ObservedTx -> TxOutItem).
Relevant: "out_txs" is a transaction that has happened (and should contain an "id" as Tx does),
while "actions" are planned transactions (and so shouldn't contain an "id", which ObservedTx does in its Tx).