docs: add Checkmate, GlitchTip, Lyrion Music Server; update Pricing downgrade warning - Service:-Checkmate.md: new page for open source uptime monitoring service - Service:-GlitchTip.md: new page for open source Sentry-compatible error tracking - Service:-Lyrion-Music-Server.md: new page for open source music server with S3 support - Pricing.md: document confirmation modal when downgrading to Free with running instances (osaas-app#3394) Co-Authored-By: Claude <noreply@anthropic.com>

Claude Agent committed Apr 26, 2026