fix: IS 4.5.0 -> 5.0.0 migration — USD metadata, DomeLight, scene reuse

- Fix USD metersPerUnit/upAxis for IS 5.0.0 (no longer auto-compensated)
- Batch fix all Aligned_obj.usd, table, and art USD files with backups
- Fix DomeLight rotation to Z-axis only (prevent tilted environment map)
- Fix scene reuse across episodes (arena_file caching, task clearing, prim guard)
- Add migration tools: scan_usd_metadata.py, fix_usd_metadata.py
- Add migration guide: migerate/migerate.md
- Add nvidia-curobo to .gitignore
- Fix sort_the_rubbish config: obj_0 -> obj_1 (obj_0 does not exist)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

workflows/simbox/core/skills/track.py

@@ -143,6 +143,8 @@ class Track(BaseSkill):
     def cal_table_2_base(self):
         tgt = self.task.fixtures["table"]
         bbox_tgt = compute_bbox(tgt.prim)
+        print(f"[BBOX_DBG] table bbox min={list(bbox_tgt.min)}, max={list(bbox_tgt.max)}", flush=True)
+        print(f"[BBOX_DBG] T_base_2_world translation={self.T_base_2_world[:3, 3]}", flush=True)
         table_center = (np.asarray(bbox_tgt.min) + np.asarray(bbox_tgt.max)) / 2
         tgt_z_max = bbox_tgt.max[2]
         table_center[2] = tgt_z_max