Preserve full native depth range

[jackhai9]

Summary

• preserve every active RPI price level instead of truncating to the nearest 1000
• defer price-level aggregation to the existing TradingView pixel renderer
• keep sparse one-pixel rows so real liquidity gaps remain visible

Validation

• npm run build:binance-orderbook-trade
• npm run check:binance-orderbook-trade
• npm test
• git diff --check
• synthetic 20,000 levels per side: 9.26 ms average profile build