The core gives `.npc add` and temporary creatures guids above MAX(creature.guid), so allocating
upward put the server's own spawns in the guids a project takes next. Counting down from the top
makes the range's last guid that maximum after the first export.
With EDITOR_WORLD_DB set, `check` and `export` compare the server's rows in the range with the
project and refuse on a conflict, and the editor takes the brush's display and name from
creature_template.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
sindoring
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