SeedShield

Fixed: Issue where other structures were changed but the fortress was not.

SeedShield prevents seed cracking tools (chunkbase, SeedCrackerX, Structurecracker) from determining structure locations by replacing each structure type's placement salt with an irreversible SHA-256 derived value.

This is the first Paper/Spigot plugin to provide cryptographic structure seed protection. Previously, this level of protection was only available through Fabric mods or custom server forks.