Add a pose review harness and record the blocked pose capture

TODO.md

@@ -60,6 +60,14 @@ except the rebuilt assets themselves.
       finger-curl rig or the current open hand plus `HAND_ITEM_FORWARD`, and record the limit.
 - [ ] Weights/pose: capture idle, walk, sit and wave; inspect shoulder, hip and neck collapse;
       fix the worst offenders using `rigging` practice without changing the 13-bone contract.
+      **Blocked:** the new `capture_npc_pose.gd` reports the seated/walking pose while the saved
+      frames still show the rest pose; direct bone writes deform the mesh, so this is a staging/
+      capture discrepancy that may also affect live venue frames. See
+      `docs/3d-model-review.md` §"Pose evidence is blocked".
+- [ ] Diagnose the pose-capture discrepancy: compare the harness staging with the working
+      standalone probe (SceneTree lifetime, node parents, first-frame skin bind, capture timing)
+      and add a scene test asserting a posed avatar renders differently from its rest frame.
+      Do not trust pose sheets or claim rig deformation until that test passes.
 - [ ] UV/texel density: measure the 256² slot maps; decide whether atlas, UDIM or a resolution
       change is justified. Do not change `CHAR_MAX_TRIS`/`CHAR_MAX_VERTS` without re-running the
       budget smoke and the Web/Compatibility path.