Guard gear fit with headless and Blender regression checks

The Python fit test now caps the glasses at 0.70x head width and requires a
positive bag clearance on both the coat and dress. The Godot character suite
loads head/back gear on six roles and checks attach parents, head width and
brow bounds, and that back gear reaches beyond the 0.26 m body silhouette.
Rebuilt and re-baked all 18 gear assets; no-op GLB export churn was reverted.
Headless 229/229, Python 87/87.

MEMORY.md

@@ -241,6 +241,11 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
   same colliders/obstacles, and collects library emissives for `set_night_mode()`.
   `LIBRARY_TRIANGLE_BUDGET` = 60k (current ~27,986). Library props are excluded from
   `PROP_PLACEMENTS` only when they need dedicated slots (door/marquee/sedan/handrail/lantern).
+  **Gear fit (v0.6.1):** `fit` measures head width (0.315 m), skirt/hip radius and gear bounds;
+  sunglasses are 0.202 m, the bag's body inner face is 0.262 m (coat 0.225, dress 0.260), and the
+  helmet is lifted 2 cm above the brow. `test_npc_character` guards head/back gear in Godot.
+  Blender's GLB export is byte-nondeterministic for unchanged assets (padding/index order), so do
+  not commit a full no-op rebuild; rebuild only the assets whose geometry changed.
 - **v0.6.0 environment pass:** `tools/bake_ao.py` bakes 256² AO maps per library asset
   (`<name>_ao.png`, red channel) and `Materials.apply_ao()`/`SurfaceMaterials` wire them in;
   `tools/make_normal_maps.py` derives tangent normals for the 1024² brick/concrete/asphalt