Unified Verified Mods 0.6.1

UVM 0.6.1 continues the 0.6.0 release on main and moves all registry traffic and links to https://uvm.vezit.net.

Existing signed evidence remains valid without rewriting signatures. New attestations use the new registry audience. The Observe integration from 0.6.0 is retained.

Published to Paradox Mods, ID 159198. Both .NET client test suites and all 16 registry tests pass. Two clean mod builds match; the registry records author self-verification, not an independent audit.