Tests concurrent same-name registration (exactly one succeeds), case-insensitive name collisions, expired JWT rejection, NIP-98 pubkey mismatch, and duplicate pubkey prevention. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Tests concurrent same-name registration (exactly one succeeds), case-insensitive name collisions, expired JWT rejection, NIP-98 pubkey mismatch, and duplicate pubkey prevention. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>