Revert the migration's square spawnBounds back to homeRange (the lossless inverse), which
restores main's exact homeRange lines and is far more readable for the common vendor/wildlife
case. Data diff vs main collapses to essentially just type->$type (5.9k from ~250k). ~39
genuinely non-square records keep spawnBounds. Whitespace+representation only; values and
loaded bounds are unchanged (verified by AllSpawnFilesLoad/BoundsEquivalence/LegacyHomeRange).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>