Darenfell 0.1.42.4 identifier-only audit
- Removed nonexistent Terralith 2.2.6 biome ID terralith:snowy_cherry_grove from 5 Ice & Fire biome selectors.
- Verified all 31 BYG registry-name references used by Ice & Fire against BYG 1.5.1.
- Verified remaining 55 Terralith registry-name references used by Ice & Fire against Terralith 2.2.6.
- Darenfell WDA integrations target dungeons_arise:chests/mines_treasure_big.
  The uploaded lootintegration_wda add-on explicitly references that table, and the pack manifest pins WDA project 442508 file 4047163 (1.18.2-2.1.52 release).
- No behavior/balance changes.
