CVE-2026-52733: Incomplete Cleanup

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a natural or attacker-influenced chain fork can leave stale Sapling and Orchard note-commitment subtree roots in Zebra state. In zebra-state/src/service/nonfinalizedstate/chain.rs, Chain::poptip removed a reverted tip block but did n...