Iran’s President Ebrahim Raisi on Sunday ratified a prisoner exchange treaty with Belgium, official media said, after criticism in the European country that it could free a bomb-plot mastermind. Belgium’s opposition has alleged the treaty was “tailor made” to permit the release of Assadollah Assadi, an Iranian diplomat sentenced last year to 20 years in prison. An Antwerp court convicted him of supplying explosives for a foiled 2018 bomb plot, targeting a meeting outside Paris of Iran’s exiled opposition. The Belgian government said the deal was the only way to release aid worker Olivier Vande…