{"ok":true,"service":"playful-counting-school","message":"Playful Counting School API","privacy":"/privacy","endpoints":["GET  /health","GET  /checkbackend","GET  /privacy","GET  /challenge/today","POST /challenge/:date/attempt","GET  /stats/:date","GET  /v1/history","POST /v1/history/rounds","POST /v1/history/sync","GET  /v1/stats"]}