AE2 KeyCounter Overflow Fix

AE2's VariantCounter uses a long to store the amount of each AEKey. When the stored amount approaches the maximum value of a long, adding more items can cause an integer overflow, resulting in an incorrect (potentially negative) amount.

This mod fixes this issue by preventing VariantCounter from exceeding the valid range of a Java long.

When an addition would cause an overflow, the amount is automatically clamped to the maximum or minimum representable value instead.

This mod is intended as a lightweight compatibility and bug-fix mod. It does not add any new gameplay features or content.