Refactor: review, fix, and test entire codebase
Live node:
- Fix null-handling for open_ords and get_fills requests
- Cap equity_history, strategy_equity at 600-1000 entries (memory leak fix)
- Dynamic strategy count in startup log
- Loop error recovery: catch exceptions, backoff 5s, continue
Dashboard server:
- Fix backtest detail API: check HISTORICAL_DIR first
- This was causing all historical detail views to show zeros
Tests (5 suites, all passing):
1. Signal generation: Mean Reversion VWAP + Momentum + Pairs + OBI
2. Backtest: SPX mean reversion on 500-point series
3. Hurst/VPIN: 15 signals from 280 dollar bars
4. Memory guard: RSS monitoring, GC thresholds
5. Dashboard API: historical listing + SPX detail
38 backtests on dashboard, 2 SPX entries with real trade data.
ramseshk
50f8f4f970