feat(render): Campaign OVERHAUL S2 chunk 5 + closeout — registry is the only render membership owner

Chunk 5 (consumer cutover): WalkProductionWorldData's per-cell views are
borrowed from ShadowObjectRegistry.GetRetailPartEntriesInCell and resolved
through RenderSceneQuery.TryGetByLocalEntityId; every render-side sweep,
bucket, parent-cell and root-position fallback is deleted (AD-116 for the
one-frame registry→scene window, counted in UnregisteredRenderMembershipCount).
A live entity with visual parts but no collision geometry registers
render-only (LiveEntityCollisionBuilder computes the part array before the
empty-shapes gate).

Closeout fixes found while landing it:
- RefloodOwnerForLandblock forwards the retained part array — a reflood is
  retail's recalc_cross_cells over the SAME CPartArray; without it every owner
  touched by a landblock replacement commit lost its render membership.
- Non-colliding DAT statics register render-only from BOTH publishers
  (LandblockPhysicsPublisher.PublishStaticEntity,
  LandblockPhysicsContentBuilder.RegisterRenderOnlyStatic). The G2 self-gate
  pixel diff caught them vanishing (Facility Hub wall panels): retail floods
  every object regardless of collision (CEnvCell::init_static_objects
  0x0052c350, add_shadows_to_cells 0x00514ae0).
- S2 dual review fix batch (arch + retail lens, lead-verified):
  Suspend clears the retail product (remove_shadows_from_cells 0x00511230 is
  one transaction); AttachChild/DetachChild advance the mutation revision so
  a prepared SetPosition cannot clobber a child's rows; an attached child
  never floods on its own re-registration; RemoveLandblock and the non-rooted
  RetireOwnerFromLandblock prune retail rows (render-only statics end with
  their landblock); a render-only owner's no-cell-array commit republishes at
  its destination cell (AD-117); an empty non-null part array is treated as
  null; per-move closures/LINQ replaced by index loops; EnvCell shells stay
  out of the scene's LocalEntityId index (payload-less records); the index
  predicate compares the id; the dead per-cell scene indices are deleted.

Register: AD-116 (chunk 5), AD-117 (four residual Contract A/B readings).
Evidence: s2-membership-ownership-map.md §8 (chunk 5) and §9 (closeout).

Gates (Release): Core 4,984/4,984; Content 214/214; Runtime 1,884/1,884;
App hermetic lane 6,760/6,760; App InstalledDat lane 217 pass / 1 skip /
2 pre-existing #383 layout-fixture failures; App Windows lane 1/1.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/AcDream.App/Streaming/LandblockPhysicsPublisher.cs

@@ -1084,6 +1084,34 @@ public sealed class LandblockPhysicsPublisher
             }
         }
 
+        // Campaign OVERHAUL S2 chunk 5 closeout: a DAT static with visual
+        // parts but NO collision geometry (decorative trim, wall panels,
+        // banners) is still a CPhysicsObj retail floods into its cells —
+        // calc_cross_cells_static (0x00515160) takes the find_bbox_cell_list
+        // route over the part array when there is no cylsphere, and
+        // add_shadows_to_cells (0x00514ae0) publishes AddPartsShadow rows
+        // for every part regardless of collision. Since chunk 5 the walk
+        // draws ONLY what the registry flooded (the parent-cell fallback is
+        // deleted), so such a static must register render-only here or it
+        // vanishes (G2 self-gate: the Facility Hub's purple-lit wall panels).
+        if (entityBspCount == 0 && entityCylinderCount == 0
+            && partArray.Count > 0)
+        {
+            publication.StagingEngine.ShadowObjects.RegisterMultiPart(
+                entity.Id,
+                entity.Position,
+                entity.Rotation,
+                Array.Empty<ShadowShape>(),
+                0u,
+                EntityCollisionFlags.None,
+                publication.Origin.X,
+                publication.Origin.Y,
+                landblock.LandblockId,
+                seedCellId: entity.ParentCellId ?? 0u,
+                isStatic: true,
+                partArray: partArray);
+        }
+
         if (entityBspCount > 0)
             publication.BspOwnerCount++;
         if (entityCylinderCount > 0)