fix(D-01/B): hood missing MOUTH block + organic items lockable:false

- Hood: add MOUTH to blocked_regions — prevents double gag stacking
- 8 organic items (slime, vine, web, tape): set lockable:false at top
  level for consistency with can_attach_padlock:false

src/main/resources/assets/tiedup/tiedup_items/web_gag.json

@@ -8,7 +8,7 @@
   ],
   "pose_priority": 10,
   "escape_difficulty": 50,
-  "lockable": true,
+  "lockable": false,
   "can_attach_padlock": false,
   "supports_color": false,
   "animation_bones": {