feat(rendering): compare the incremental shadow scene

Construct Slice F's non-drawing scene only for lifecycle automation, drain accepted static and live deltas at the final update boundary, and compare exact current-path fingerprints at cadence and checkpoints. Publish bounded mismatch, journal, index, digest, and memory evidence without changing normal launches or draw submission.

Release: 8,211 passed, 5 skipped.

src/AcDream.App/Net/LiveSessionResetManifest.cs

@@ -33,6 +33,7 @@ internal sealed class LiveSessionResetBindings
     public required Action InboundEventFifo { get; init; }
     public required Action LiveLiveness { get; init; }
     public required Action LiveRuntime { get; init; }
+    public required Action RenderSceneProjection { get; init; }
     public required Action SessionIdentity { get; init; }
     public required Action RemoteTeleport { get; init; }
     public required Action NetworkEffects { get; init; }
@@ -81,6 +82,10 @@ internal static class LiveSessionResetManifest
             new("inbound event fifo", bindings.InboundEventFifo),
             new("live liveness", bindings.LiveLiveness),
             new("live runtime", bindings.LiveRuntime),
+            // Canonical teardown appends exact projection removals. Drain them
+            // before identity changes so no prior-session scene record or
+            // journal entry can carry into the next character generation.
+            new("render scene projection", bindings.RenderSceneProjection),
             // Identity must remain A until live teardown has converged so
             // player-specific teardown can still classify the old record.
             new("session identity", bindings.SessionIdentity),

src/AcDream.App/Net/LiveSessionRuntimeFactory.cs

@@ -5,6 +5,7 @@ using AcDream.App.Input;
 using AcDream.App.Interaction;
 using AcDream.App.Physics;
 using AcDream.App.Rendering;
+using AcDream.App.Rendering.Scene;
 using AcDream.App.Rendering.Selection;
 using AcDream.App.Rendering.Vfx;
 using AcDream.App.Settings;
@@ -86,7 +87,8 @@ internal sealed record LiveSessionWorldRuntime(
     EntityEffectController EntityEffects,
     AnimationHookFrameQueue AnimationHookFrames,
     LiveEntityPresentationController Presentation,
-    RemoteMovementObservationTracker RemoteMovementObservations);
+    RemoteMovementObservationTracker RemoteMovementObservations,
+    RenderSceneShadowRuntime? RenderSceneShadow);
 
 /// <summary>
 /// Builds the exact per-generation route/reset graph for the canonical live
@@ -177,6 +179,8 @@ internal sealed class LiveSessionRuntimeFactory
         InboundEventFifo = _world.InboundEvents.Clear,
         LiveLiveness = _world.Liveness.Clear,
         LiveRuntime = ResetLiveRuntime,
+        RenderSceneProjection =
+            () => _world.RenderSceneShadow?.DrainUpdateBoundary(),
         SessionIdentity = ResetIdentity,
         RemoteTeleport = _world.RemoteTeleport.Clear,
         NetworkEffects = _world.EntityEffects.ClearNetworkState,