alpha_dash accepted eu_west, -edge and edge-, none of which are valid DNS
labels — every host in such a datacenter would have failed registration and,
because DNS is non-fatal, silently ended up without a name. The console now
requires a proper label, and the step normalises anything created before that
rule so existing rows still get a usable name.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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