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>

docs/launch-options.md

@@ -337,7 +337,7 @@ issue is closed, the strip was missed; delete both.
 | `ACDREAM_PROBE_CATHEDRAL_SKIP_LOOKIN_SHELL` | Campaign FW exact look-in shell discriminator | full hexadecimal cell id, e.g. `F4180112` | suppresses one exact EnvCell shell only when reached through a building look-in; its ordinary interior-root repaint is unchanged | **Behavior-changing diagnostic**; never use as a production fix | `RenderingDiagnostics.ProbeCathedralSkipLookInShellCellId` |
 | `ACDREAM_PROBE_CATHEDRAL_SKIP_SOUTH_BUILDING_SHELL` | Campaign FW south-building carrier discriminator | `=1` | suppresses only the own exterior shell of the cathedral building anchored at `0xF4180112`; its portal walk, look-in cells, and particles remain live | **Behavior-changing diagnostic**; never use as a production fix | `RenderingDiagnostics.ProbeCathedralSkipSouthBuildingShell` |
 | `ACDREAM_PROBE_CATHEDRAL_SHELL_ORDER` | Campaign FW floating-stair shell-order trace | `=1` | samples the ONE walk's actual replay event order every fifth cathedral frame (`CLEAR`, `SEALS`, punches, marks, and EnvCell shells) and reports render-stamp-deduplicated whole-shell turns for cells `0xF4180104/0106/0107/0112/0113/0114` | print-only; never changes admission, depth state, or draw order | `RenderingDiagnostics.ProbeCathedralShellOrderEnabled` |
-| `ACDREAM_PROBE_FACILITY_STAIRS` | #177 Facility Hub stair probe (committed by the `b3b7d922` investigation checkpoint) | `=1` | traces the classifier admission, ordered-stream append, ring upload, and final indirect draw of the authored stair GfxObj `0x010000DE` and the local-player setup parts in cells `0x8A02015E/015F/01C1`, plus the walk root signature for those cells | print-only; never influences admission, order, or depth state; scheduled for deletion in Campaign OVERHAUL S5 | `RenderingDiagnostics.ProbeFacilityStairsEnabled` (read sites in `RetailPViewRenderer`, `WalkPView`, `WalkProductionWorldData`, `WalkStaticStreamPopulator`, `WbDrawDispatcher.*`) |
+| `ACDREAM_PROBE_FACILITY_STAIRS` | #177 Facility Hub stair probe (committed by the `b3b7d922` investigation checkpoint) | `=1` | traces the classifier admission, ordered-stream append, ring upload, and final indirect draw of the authored stair GfxObj `0x010000DE` and the local-player setup parts in cells `0x8A02015E/015F/01C1`, plus the walk root signature for those cells; Campaign OVERHAUL S2 chunk 5 added a `[walk-membership]` line, printed once at the start of a frame only when `WalkProductionWorldData.UnregisteredRenderMembershipCount` was nonzero the PRIOR frame (an entity the registry flooded into a cell but the presentation scene could not resolve yet that frame) | print-only; never influences admission, order, or depth state; scheduled for deletion in Campaign OVERHAUL S5 | `RenderingDiagnostics.ProbeFacilityStairsEnabled` (read sites in `RetailPViewRenderer`, `WalkPView`, `WalkProductionWorldData`, `WalkStaticStreamPopulator`, `WbDrawDispatcher.*`) |
 | `ACDREAM_PROBE_SEAMDRAW` | #176, "throwaway apparatus" | `"1"`/`"true"`/blank → default #176 Facility Hub cell set (7 fixed hex ids); otherwise comma-separated hex cell-id list | change-deduped + 2 s-heartbeat `[seam-cell]`/`[seam-snap]`/`[seam-ent]`/`[seam-mask]` lines from `EnvCellRenderer.Render` and `WbDrawDispatcher` describing per-instance transforms and resolved light-set identities at target cells | print-only | `RenderingDiagnostics.ProbeSeamDrawEnabled` / `SeamDrawTargetCells` |
 | `ACDREAM_PROBE_STEP_WALK` | a6.p3 issue #98 | `=1` | gates `[step-walk]` lines at select points in the transition sub-step loop and step-down probe (requested vs adjusted offset, sphere positions, contact planes, walkable flags) | print-only; no DebugPanel mirror | `PhysicsDiagnostics.ProbeStepWalkEnabled` |
 | `ACDREAM_PROBE_SWEPT` | phase w stage 0 | `=1` | gates one `[cell-swept]` line per `ResolveWithTransition` call comparing the transition's swept cell vs the legacy static `ResolveCellId` path | print-only | `PhysicsDiagnostics.ProbeSweptEnabled` |