- Implement load_from_dbn() for both PPO and DQN hyperopt adapters
using dbn::DbnDecoder (same pattern as RealDataLoader)
- Fix PPO feature extraction: [f64;51] → [f32;54] with zero-padded
portfolio state (was silently dropping all samples due to len==54 check)
- Add NaN/Inf → 1e6 penalty in optimizer for non-finite objectives
- Fix partial_cmp().unwrap() panic when comparing NaN objectives
- Add ensemble real-model validation test (DQN + PPO trained on
real 6E.FUT data, predictions aggregated through ensemble)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
