use modeling_status_hint to omit certain items

This is a new field I just added manually:
```
ALTER TABLE items ADD COLUMN modeling_status_hint ENUM('done', 'glitchy');
```

Done means it's actually done being modeled, despite the heuristics telling us otherwise. And glitchy means there's DTI issues that prevent us from making progress on it.

setup-mysql.sql

@@ -49,6 +49,7 @@ BEGIN
     ON pet_types.body_id = swf_assets.body_id
   WHERE
     pet_types.color_id = "8"
+    AND items.modeling_status_hint IS NULL
   GROUP BY items.id
   HAVING
     NOT (