Conjured items degrade twice as fast as normal ones. Matched by name
prefix so any "Conjured ..." item works, not just the Mana Cake.
Wrote the tests first, then the updater. Only the Mana Cake lines
changed in the approved output.
One test per rule from the requirements, replacing test_foo. Tier
boundaries are checked on both sides, e.g. backstage passes at 11 and 10,
so an off-by-one can't slip through. All pass against the original code
with 100% branch coverage.
uzairarslan