fix(mukke): lint fixes, rate limiting, DB indexes, and prod config

- Add ThrottlerModule rate limiting to backend
- Add DB indexes on userId, songId, playlistId columns
- Lint/formatter fixes from pre-commit hooks
- Add GlitchTip error tracking to docker-compose.macmini.yml
- Add glitchtip.mana.how to cloudflared tunnel config

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cloudflared-config.yml

@@ -100,5 +100,9 @@ ingress:
   - hostname: link.mana.how
     service: http://localhost:4090
 
+  # GlitchTip Error Tracking
+  - hostname: glitchtip.mana.how
+    service: http://localhost:8020
+
   # Catch-all
   - service: http_status:404