VillagerAutoTradeReroll Fix

Fixed: Reroll lock not persisting after leaving/rejoining the world

Previously, once you traded with a villager, the mod correctly prevented further rerolls — but only while that villager stayed loaded in memory. If you left the area (chunk unloaded) or left the world entirely and came back, the "already traded" lock would reset, letting you reroll a villager you'd already bought from.

This has been fixed. The mod now saves the "has this villager been traded with" status directly to the villager's data, so it survives:

• Walking far enough away for the chunk to unload
• Logging out and back in
• Closing and reopening the world/server

Once you trade with a villager, the reroll lock is now permanent for that villager — no more exploiting a relog to reset it. Older versions inflict with the new version. Not posting older versions for this purpose.