Mark the 62-to-13 joint map complete

TODO.md

@@ -66,8 +66,12 @@ baseline sheet.
 
 ### 2. Contract bake and animation
 
-- [-] Author the 62-joint → 13-core joint map, including optional finger/face extras if
+- [x] Author the 62-joint → 13-core joint map, including optional finger/face extras if
       they survive within 24,000 vertices; record it in `docs/npc-model-sourcing.md`.
+      Map recorded: Hips←Hips (Root+Body collapse), Spine←Abdomen/Torso/Chest, Neck←Neck,
+      Head←Head, Shoulder←UpperArm (collar collapses), Elbow←LowerArm, Hand←Wrist,
+      Hip←UpperLeg, Knee←LowerLeg. Optional: 30 finger bones + Foot.L/R (toe); dropped: PT.L/R
+      pole targets. Quaternius hierarchy measured (Foot is a child of Root, not LowerLeg).
 - [ ] Bake the rest pose and proportion warp to the contract hip, knee, shoulder, elbow,
       wrist and head positions. Measure the warp at every joint and record the silhouette
       deltas; do not accept a distorted deltoid or shortened arm.