v1.6.0 — Feat: benchmark suite with six baseline models

What's changed

New features

• Six baseline models added for benchmark comparison:
  • Simple Breakout (20-period → 288-period rolling high/low)
  • MA Crossover (EMA 12/26)
  • RSI mean-reversion (period 14, oversold 30 / overbought 70)
  • 2-state Gaussian HMM regime-switching
  • GARCH(1,1) for ETH, SOL, XRP
  • MDRS-SDE for ETH, SOL, XRP
• BuyAndHoldBenchmark ported from mdrs-sde with qr-buy-and-hold CLI
• ModelRegistry refactored with ModelEntry dataclass
  • requires_event_tagging flag controls DatasetBuilder pipeline
  • MDRS-SDE: event tagging on, all other models: event tagging off
• backtest.py updated to skip event tagging for non-MDRS-SDE models

New model keys

• mdrs_sde_sol, mdrs_sde_xrp
• garch_sol, garch_xrp
• simple_breakout_{btc,eth,sol,xrp}
• ma_crossover_{btc,eth,sol,xrp}
• rsi_{btc,eth,sol,xrp}
• hmm_{btc,eth,sol,xrp}

Usage

# Run individual benchmarks
qr-backtest --model simple_breakout_btc --symbol BTCUSDT
qr-backtest --model ma_crossover_btc --symbol BTCUSDT
qr-backtest --model rsi_btc --symbol BTCUSDT
qr-backtest --model hmm_btc --symbol BTCUSDT
qr-backtest --model garch_btc --symbol BTCUSDT

# Buy-and-Hold
qr-buy-and-hold --symbol BTCUSDT --start 2020-04-01 --end 2026-01-31