OHLC candles for one builder-dex contract
get
/v1/markets/hyperliquid/perp-dex/{dex}/contracts/{symbol}/candlesHL `candleSnapshot` window. `interval` ∈ { 1m, 5m, 15m, 1h, 4h, 1d }. `limit` clamped to [1, 500]; default 100. Cached 30s. Four windowing strategies — same shape as the perp / spot endpoints.