render: extract M2 animation resource finalizer

RENDER.md

@@ -46,6 +46,7 @@ Paired run 2026-07-11 подтвердил крупный coordinate/placement g
 - `src/render/m2/m2_static_build_resource_observer.gd` - static Mesh cache lookup, threaded request selection and missing transition.
 - `src/render/m2/m2_cached_animation_resource_observer.gd` - cached animated GLB eligibility, threaded request admission and snapshot production.
 - `src/render/m2/m2_animation_load_pipeline_state.gd` - animated M2 threaded-load request records and completion-order finalize FIFO without I/O or Node ownership.
+- `src/render/m2/m2_animation_resource_finalizer.gd` - cached animated M2 terminal status polling, Resource load, scene finalization and prototype/static-only outcome.
 - `src/render/m2/m2_mesh_load_pipeline_state.gd` - static M2 threaded-load request records, terminal statuses and completion-order finalize FIFO without I/O or Mesh ownership.
 - `src/render/m2/m2_mesh_resource_cache_state.gd` - normalized-path prepared static M2 Mesh references with final-shutdown lifetime.
 - `src/render/m2/m2_mesh_resource_extractor.gd` - first-Mesh selection from direct/PackedScene/Node inputs with temporary instance cleanup.
@@ -1155,6 +1156,19 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
   metrics and visible behavior are unchanged. Generated GLB metadata fixtures
   are not private asset, leak, p95/p99 or original-client animation evidence.
 
+## 2026-07-18 M2 Animation Resource Finalizer Extraction
+
+- `M2AnimationResourceFinalizer` now owns cached animated M2 terminal status
+  polling, completion-FIFO pops, terminal Resource retrieval, candidate
+  instantiation, repair/validation, prototype/static-only adoption and success log.
+- The two-phase preparation/completion API preserves the prior ordering: the
+  loader resolves a material prototype only after a loaded PackedScene produces
+  a detached Node3D candidate. One scheduler permit still pops one record.
+- `StreamingWorldLoader` retains the `M2_ANIMATION_FINALIZE` permit loop,
+  material-prototype lookup, build dispatch, materialization and SceneTree lifetime.
+- No request order, status rule, cache format, profile or visible behavior changed.
+  Synthetic fixtures are not asset-backed animation/leak/p95/p99 evidence.
+
 ## 2026-07-18 M2 Native Animation Resource Observer Extraction
 
 - `M2NativeAnimationResourceObserver` now owns the exact case-insensitive