动态 Mesh 长出新顶点却被剔除：顶点、索引与 Bounds 必须是一份快照

public readonly record struct Vec3(float X, float Y, float Z);

public readonly record struct Bounds(Vec3 Min, Vec3 Max)
{
    public bool Contains(Vec3 point) =>
        point.X >= Min.X && point.X <= Max.X &&
        point.Y >= Min.Y && point.Y <= Max.Y &&
        point.Z >= Min.Z && point.Z <= Max.Z;
}

public sealed record MeshSnapshot(
    int Version,
    Vec3[] Vertices,
    int[] Indices,
    Bounds Bounds);

public enum RejectReason
{
    None,
    EmptyGeometry,
    InvalidTriangleList,
    IndexOutOfRange,
    BoundsExcludeVertex,
    StaleVersion
}

public sealed class DynamicMeshPublisher
{
    public MeshSnapshot Current { get; private set; }

    public DynamicMeshPublisher(MeshSnapshot initial)
    {
        Current = initial;
    }

    public RejectReason TryPublish(MeshSnapshot candidate)
    {
        var reason = Validate(candidate);
        if (reason != RejectReason.None)
            return reason;

        Current = candidate;
        return RejectReason.None;
    }

    private RejectReason Validate(MeshSnapshot candidate)
    {
        if (candidate.Version <= Current.Version)
            return RejectReason.StaleVersion;
        if (candidate.Vertices.Length == 0 || candidate.Indices.Length == 0)
            return RejectReason.EmptyGeometry;
        if (candidate.Indices.Length % 3 != 0)
            return RejectReason.InvalidTriangleList;
        if (candidate.Indices.Any(i => i < 0 || i >= candidate.Vertices.Length))
            return RejectReason.IndexOutOfRange;
        if (candidate.Vertices.Any(v => !candidate.Bounds.Contains(v)))
            return RejectReason.BoundsExcludeVertex;
        return RejectReason.None;
    }
}

dotnet build $LAB_ROOT/DynamicMeshProbe.csproj -c Release
dotnet run --project $LAB_ROOT/DynamicMeshProbe.csproj -c Release --no-build

accepted: reason=None version=2 vertices=5 indices=9 boundsMaxX=2.5
rejected: reason=BoundsExcludeVertex retainedVersion=2 retainedBoundsMaxX=2.5