Walks the ieee1164 yarn, collects every node name, and assigns each a stable UUIDv7. Existing entries in priv/uuids.exs are preserved — only names not yet in the file receive a new UUID.

Run once after adding new nodes to the yarn:

mix ieee1164.gen_uuids

Commit priv/uuids.exs so the UUIDs are stable across the diffo universe.