refactor(M03): extract WMO render resource cache state

docs/modules/wmo-render-build-queue.md

@@ -21,7 +21,7 @@ all validation, planning, materialization, permit consumption and destruction.
 
 - Free or queue-free Nodes, Resources or RIDs.
 - Create MeshInstance3D/MultiMeshInstance3D or refresh materials.
-- Own frame permits, placement references, caches or load requests.
+- Own frame permits, placement references, render cache state or load I/O.
 - Change duplicate enqueue, stale-key cleanup, cancellation or ordering.
 - Change cache versions, WMO transforms, shadows, visibility or fidelity rules.
 
@@ -213,7 +213,8 @@ without exposing mutable jobs or engine objects. No runtime logs are emitted.
 |---|---|---|---|
 | WMO render build pending-state ownership | Implemented | Lifecycle/source/timing verifier | Asset-backed traversal/leak evidence pending |
 | WMO group planning | Implemented | Build-step planner verifier | Asset-backed p95/p99 pending |
-| WMO materialization/cache loading | Partial | Existing runtime regressions | Separate loader seams remain |
+| WMO render Resource state | Implemented extraction | Cache-state lifecycle/source/timing verifier | Asset-backed traversal/leak evidence pending |
+| WMO materialization/cache I/O | Partial | Existing runtime regressions | Cached-scene and I/O seams remain |
 
 ## Known gaps and risks
 
@@ -236,6 +237,7 @@ without exposing mutable jobs or engine objects. No runtime logs are emitted.
 ## Related decisions and references
 
 - [`wmo-render-build-step-planner.md`](wmo-render-build-step-planner.md)
+- [`wmo-render-resource-cache-state.md`](wmo-render-resource-cache-state.md)
 - [`wmo-placement-registry.md`](wmo-placement-registry.md)
 - [`world-renderer.md`](world-renderer.md)
 - [`../../RENDER.md`](../../RENDER.md)