Prop 192: [Revised] Enable wBTC and PAXG Oracle Feeds

This will add wBTC and PAXG to the on-chain Oracle price-feed. wBTC is wrapped Bitcoin, quoting the price directly protects any protocols using wBTC against a depeg. PAXG is tokenised gold, with a potential use-case to be a non-stable and non-crypto-native asset used to back USK