Preemptive insurance against duplicate-item proliferation when more
metals-producing mods are added (e.g. when Power Grid lands, or any
future Mekanism/Thermal/etc. addition). Today's pack only has TFMG as
the metals provider so AU is largely a no-op now, but ships with sane
default tag preferences that activate automatically as duplicates appear.
Tiny mod (~290 KB jar), client-optional/server-required per Modrinth.
