{"ok":true,"service":"ember-focus-backend","uptimeSeconds":42870,"startedAt":"2026-08-01T19:05:09.094Z","endpoints":["GET /health","POST /api/sessions","GET /api/sessions?since=<iso8601>","DELETE /api/sessions/:id","GET /api/leaderboard?limit=50","GET /api/profile","PUT /api/profile"]}