[codex] Add TQQQ pullback rebound quality gate

[Pigbibi]

Summary

• Add a TQQQ pullback quality gate that only allows below-MA200 pullback risk when QQQ has rebounded more than 3% from its rolling 20-day low.
• Keep the normal above-MA200 trend entry/hold/exit behavior unchanged.
• Surface pullback rebound diagnostics and document the new default settings.

Research Notes

• Real TQQQ 2010-02-11 to 2026-04-16: CAGR improved from 25.74% to 26.28%; max drawdown stayed at -35.77%; 30-day whipsaw count fell from 86 to 81.
• Real TQQQ 2015+: CAGR improved from 29.15% to 29.48%; max drawdown stayed at -31.65%.
• 2018-2019 improved from 4.10% CAGR / -23.62% max drawdown to 7.58% CAGR / -21.53% max drawdown.
• 2022 improved from 2.35% CAGR to 3.93%; max drawdown unchanged at -17.52%.
• Synthetic 1999+ pressure sample did not show a drawdown regression; GFC synthetic max drawdown improved slightly from -26.51% to -26.25%.

Validation

• git diff --check
• .venv/bin/python -m pytest tests/test_strategy_plans.py tests/test_entrypoints.py -q
• .venv/bin/python -m pytest -q