{"service":"SmartRingVerifierAPI","docs":"/docs","openapi":"/api/openapi","endpoints":["POST /api/ring/register   (x-operator-key) { macId, model }","POST /api/ring/verify     { macId, model, platform, date }","GET  /api/ring/list","POST /api/auth/login      { username, password }","GET  /api/auth/me         (bearer)","POST /api/qr-codes/generate          (bearer) { count, requestId, style?, color?, logo? }","POST /api/qr-codes/preview           (bearer) { style?, color?, logo? }","GET  /api/qr-codes/status?requestId= (bearer)","GET  /api/qr-codes/batches?page=&pageSize= (bearer)","GET  /api/qr-codes/{batchId}/download (bearer)","GET  /api/health"]}