v0.7.1

Fixed

• Voice resolution: Added substring-contains matching so partial names like Microsoft Aria correctly resolve before fuzzy matching can misfire on shared prefixes.

Changed

• URL-to-model mapping: voices.json and rvcs.json now contain actual JSON instead of tab-separated text. Reads old format automatically, always writes JSON.
• Renamed internals: All Registry references renamed to UrlMap to avoid confusion with the Windows Registry.
• README: Self-documenting example dialogue, folder URLs for Piper downloads, silent install example, type prefix disambiguation.