GiddyVaultV3 Signature Replay

GiddyVaultV3 was exploited on Ethereum in transaction `0x5edb66a4c2ea55bba95d36d27713e3bb1c67c3c4199a8a1759e754c6f25482e5`, mined on 2026-04-23 11:57:47 UTC. The root cause was an authorization-bypass bug in `compound()` signing: the vault validated a signature that covered only `keccak256(swap.data...