refactor(M03): extract M2 animation load pipeline state

RENDER.md

@@ -36,6 +36,7 @@ Paired run 2026-07-11 подтвердил крупный coordinate/placement g
 - `src/render/liquid/adt_water_load_pipeline_state.gd` - ADT water pending FIFO/dedupe, active task IDs and worker-safe parsed-result mailbox without parser or Node ownership.
 - `src/render/liquid/adt_water_scene_finalizer.gd` - stateless main-thread ADT water build/attach and optional persisted Editor ownership through the existing ADTBuilder.
 - `src/render/m2/m2_runtime_mesh_rebuild_classifier.gd` - memoized billboard/UV-rotation decision for stale cached M2 runtime mesh refresh.
+- `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_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.
@@ -1083,6 +1084,20 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
 - Cache formats, material refresh, profiles and visible output are unchanged.
   Synthetic state timing is not asset-backed I/O, leak or p95/p99 evidence.
 
+## 2026-07-17 M2 Animation Load Pipeline State Extraction
+
+- `M2AnimationLoadPipelineState` now owns animated M2 successful threaded-load
+  request records and the FIFO populated at loaded/failed terminal transitions.
+- Pending snapshots preserve insertion order, while finalization follows completion
+  order. All three historical `m2_animation` metrics still count both stages.
+- Shutdown still drains pending ResourceLoader paths before clear; map reset and
+  shutdown preserve the same two clear sites.
+- `StreamingWorldLoader` retains GLB eligibility/cache selection, every
+  ResourceLoader call, `M2_ANIMATION_FINALIZE` permits, scene instantiation,
+  material repair and prototype/static-fallback decisions.
+- Cache formats, animation behavior and visible output are unchanged. Synthetic
+  timing is not asset-backed I/O, leak, animation-fidelity or p95/p99 evidence.
+
 ## 2026-07-17 M2 Mesh Resource Cache State Extraction
 
 - `M2MeshResourceCacheState` now owns normalized-path references to prepared