Six tests against the "rules worth pinning" list: critical fed in full while
a lower tier starves; two consumers in one tier rationed proportionally to
their own request, not split evenly; an empty tier passes its share down
instead of swallowing it; reactor throttling moves the line between what
starves and what doesn't; a starved tier cannot leak into a lower one; and a
tier change on an equipped item takes effect on the very next tick with no
unequip/re-equip round trip.
103 -> 109 tests. Each rule has a matching mutation in
tests/mutation_tests_stats_power_cut5.py.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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