- Replace hardcoded `total_count: 0` with `summaries.len() as u32` in list_backtests - Add tracing::warn! in get_backtest_results when equity_curve is returned empty - Add tracing::warn! in stop_backtest noting task cancellation is not yet implemented - Import `warn` from tracing alongside existing debug/error/info imports Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>