Aetheria.Shared.csproj drops the Library\PackageCache math sources and
references CultMath.csproj under the pinned CultLibRoot. The asmdefs drop
Unity.Mathematics; Tests overrides references, so it names CultMath.dll in
precompiledReferences. The manifest drops com.unity.mathematics (Burst and
Collections still resolve it) and adds org.gamecult.cultmath at
cultmath-unity-v0.2.1.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>