refactor(M03): extract M2 placement transform resolver

RENDER.md

@@ -990,6 +990,19 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
 - M2/ADT cache formats, transforms, profiles and visible rules are unchanged.
   Asset-backed cross-boundary p95/p99 and visual acceptance remain required.
 
+## 2026-07-16 M2 Placement Transform Resolver Extraction
+
+- `M2PlacementTransformResolver` now owns the pure ADT M2 basis and local
+  origin-compensation formulas used by worker grouping, placeholders and direct
+  instance creation.
+- Regular models retain `Basis.from_euler`; `ElwynnCliffRock01/02` retain their
+  narrow shell correction; `NewWaterfall` and `ElwynnTallWaterfall01` retain
+  calibrated world yaw, local fall-axis twist and tall-sheet anchor compensation.
+- Path separator/case/MDX handling, constants and caller-specific final scale
+  clamps are unchanged. The resolver owns no Node, task, cache or RID.
+- Cache formats, placement positions and visible rules are unchanged by the
+  extraction. Asset-backed visual recheck and general placement parity remain gaps.
+
 ## 2026-07-16 World Environment Snapshot Facade
 
 - `WorldEnvironmentSnapshot` carries one immutable finite time-of-day value,