Spoiled Weighted Average - Au Naturel Edit

Problem: Spoiled was calling getItem() on unopened minecarts/chest boats, triggering loot table generation, which caused Alex's Caves loot modifier to run expensive map rendering code, blocking the server thread for 89.78% of tick time.

Solution: Added checks to skip unopened container entities (just like block entities were already being skipped)

Result: Unopened minecarts and chest boats are now excluded from spoilage checks, eliminating synchronous chunk loading lag.