Conflict detection

A permissionless registry has a real risk: two people registering the same asset. Verity checks every listing against every other listing of the same type and flags collisions:

• Identical normalized location strings (case-folded, punctuation stripped).
• Identical normalized names within the same asset type.

Conflicts appear as a prominent panel on each listing's dashboard, with the competing listing linked and its registrant shown. Verity doesn't judge who's right — but the flag makes it impossible for a bad actor to quietly duplicate a listing.