fix(docs): correct D-160 segment count in asset org doc footer (17→18)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/architecture/character-asset-organization.md

@@ -744,7 +744,7 @@ revisit if visual quality is insufficient.
 ## Decisions Referenced
 
 - **D-159:** 5 adult body types x 2 genders + 1 child = 11 base meshes (updated: added Teen)
-- **D-160:** Body meshes segmented into 17+ bone-group regions with swappable torso variants and per-leg L/R split
+- **D-160:** Body meshes segmented into 18 bone-group regions with swappable torso variants and per-leg L/R split
 - **D-161:** Head is always a separate mesh on the Head bone
 - **D-162:** Clothing is pre-baked per body type via Surface Deform
 - **D-163:** Trellis generates heads via BoneAttachment3D (offline asset production, curated into template library)