Run dataset: equity-display (run_id comes from GET /v1/backtests/{id})

The numbers behind a finished run. Requires the resultsHistory plan feature. The same data is served to the app at /api/runs/{runId}/equity-display under a session JWT; this is the key-authed mirror. Page with offset+limit, or ask for maxPoints to get an even downsample of the WHOLE range in one call. The equity curve at DISPLAY resolution: up to ~4,000 calendar aligned buckets (hours, days or months, whichever the run's span affords), each contributing its first, lowest, highest and last bar as real {date, equity, drawdown} points, so the line and the drawdown strip are exact at this resolution and the last bar of every period is present. Runs saved since 2026-09-14. Read equity for the per bar series (rolling statistics, bar exact windows).