c25397b544
Commit 9391645 lowered the three common guaranteed trade goods from a certain
drop to 60% and left the rare Charred Raider Insignia at 100%, but the seed
test kept asserting 1.0000 for all four and has been failing since.
Asserts the real per-item value instead of one shared constant, so the next
retune fails on the number that actually changed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>