Deletes ItemManager.RollQuality and RarityTier.Rarity. Faction keys 19 and 20
(18 is reserved for Livery). AetherDb assembly-from-maker derives the fields.
Builds AetherDb on the CultLib 45c2f400 / CultMath 9c1b06cd pins; Shared.Tests
not yet run; the shipped-catalog test fails until the catalog commit follows.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>