spotify-api-watch

Check for Spotify Web API changes and verify this server still matches them. Use when the user says "check the Spotify API", "any Spotify API changes", "/spotify-api-watch", before a release, or on a schedule. Also use when a Spotify tool starts failing in a way that smells like an upstream change (sudden 403/400 on a tool that used to work, missing response fields, shrunken result counts).