IsRevealed is now the observer's book (Entity.HasReveal) plus the live filter
(still on its ship, not IsDestroyed). The tier ladder and
GameplaySettings.TargetArmorInfoThreshold are deleted, with the 19 fixture
initializers and the Settings.asset line. Fixtures that aim at an item record
its reveal through RecordReveal; Aetheria.Shared exposes internals to
Aetheria.Shared.Tests for that. Unbuilt and untested at this commit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>