Navidrome 0.64 opens its API to Jellyfin clients and migrates IDs to 128 bits

Navidrome 0.64, released September 12, 2026, adds an experimental Jellyfin Music API that lets clients like Finamp and Jellify connect, and re-encodes all internal IDs to a canonical 128-bit format. Back up the database before upgrading and re-sync clients that cache IDs.