Fix NPE in EnergyStorageItemBlockEnergyContainer when itemAccess is null

[Copilot]

inventoryTick was obtaining the energy capability with null as the ItemAccess context, which propagated into EnergyStorageItemBlockEnergyContainer.itemAccess = null. When the auto-supply tick triggered extract() with a live TransactionContext, setItemStackEnergy would crash calling itemAccess.exchange().

Change

• Pass ItemAccess.forStack(itemStack) instead of null in inventoryTick, consistent with every other capability lookup in the codebase.

// Before
EnergyHandler energyStorage = itemStack.getCapability(Capabilities.Energy.ITEM, null);

// After
EnergyHandler energyStorage = itemStack.getCapability(Capabilities.Energy.ITEM, ItemAccess.forStack(itemStack));