Wire ensemble agent configuration into DQN hyperparameters:
- ensemble_count: number of agents in ensemble (default 1 = no ensemble)
- ensemble_diversity_weight: KL-divergence diversity loss weight (default 0.01)
Both fields default to backward-compatible values (single agent, no
diversity loss) and are plumbed through the conservative() constructor.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>