Changelog

1.1.0

Anti-cheat: server-sanction gate. Key protection now only activates on a server that also runs this mod (or when you are the host). A server running the mod sends each connecting client a ServerHello handshake RPC; a client only protects keys if it received that Hello. On any server without the mod, no Hello arrives, protection stays off, and keys consume normally — so the DLL can't be carried to another server as a portable cheat. The gate is not client-configurable.
Resets sanction state on disconnect / new connection so it can never leak between servers.

Initial release.
Swamp/Crypt Key ($item_cryptkey) is no longer consumed when opening a Sunken Crypt gate.
Patch-order-proof Door.Open Prefix/Finalizer protect window guarding Inventory.RemoveOneItem / RemoveItem.
Config: Enabled, ProtectAllKeyedDoors, CryptDoorNameContains.