{"status":"ok","service":"snev-ml","version":"3.0.0","endpoints":{"/signals":"Regime signals for a symbol (GET, ?symbol=BTC)","/market":"BTC-as-bellwether market overview (GET)","/calibrate":"Walk-forward regime calibration (POST, ?symbol=BTC)","/calibrate-and-backfill":"Calibrate then backfill history (POST)","/signals/backfill":"Backfill historical signal records (POST)","/health":"Health check (GET)"}}