Previously fixed at w_dd=1.0, dd_threshold=0.02. Now PSO can search:
- w_dd: [0.0, 5.0] — drawdown penalty weight (0=disabled, 5=aggressive)
- dd_threshold: [0.01, 0.15] — drawdown % before penalty starts
Search space expanded from 22D to 24D. Backward compatible: vectors
shorter than 24 elements use defaults via bounds check.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>