BSQ trade fee validation NACK if tx unconfirmed for a long time

[ghost]

Fixes #6603

When a user's wallet is out of sync they may create offers where the fee tx will never be confirmed, and would cause a failed trade if offer is taken.

Maker fees paid in BSQ cannot be checked until the tx confirms and is in the DAO database:

• If an offer is confirmed, check the BSQ fee as usual.
• If an offer is unconfirmed for more than 8 hours assume there is a wallet problem and NACK the validation, which will prevent the offer from being taken.
• If an offer confirms after 8 hours the validation will be able to check the fee.

Taker fees paid in BSQ are checked after the 1st confirmation.

[ripcurlx]

utACK