Scan both instance and static declared fields so a second static WalkPView or RetailFrameWalk owner cannot evade the final-graph architecture proof. Preserve the exact owner/count assertions.
Mutation evidence (both restored):
1. Added static WalkPView field to RetailPViewRenderer -> WalkFrameOwners_AreUnique first failed Assert.All: expected RetailFrameWalk owner, actual RetailPViewRenderer (3 fields).
2. Added static RetailFrameWalk field to RetailFrameWalk -> WalkFrameOwners_AreUnique first failed Assert.Single with _frameWalk and MutatedStaticRetailFrameWalk.
Delete the callerless portal-BFS research graph and spent renderer probe families while retaining the production RetailFrameWalk path, terrain diagnostics, membership invariant, and walk transcript.
Mutation evidence (all restored):
1. Restored PortalVisibilityBuilder type -> AppAssembly_ContainsNoSupersededPortalGraphTypes first failed Assert.Empty with AcDream.App.Rendering.PortalVisibilityBuilder.
2. Restored ACDREAM_PROBE_FACILITY_STAIRS -> ProductionSource_ContainsNoDeletedRendererProbe_AndRetainsWalkTranscriptProof first failed Assert.Empty on RenderingDiagnostics.cs.
3. Added a second RetailFrameWalk field -> WalkFrameOwners_AreUnique first failed Assert.Single with _frameWalk and _mutatedSecondFrameWalk.
4. Added OrderBy to OrderedStream -> OrderedWalkStream_HasNoCrossStreamReorder first failed Assert.DoesNotContain on OrderBy(.
5. Added IDatReaderWriter parameter -> FrameTimeWalkOwners_HaveNoRawDatDependency first failed Assert.Empty on RetailFrameWalk.MutatedRawDatParameter.
