Maximize environment: curriculum task, metrics endpoint, 5 bug fixes, notebook fix

Add long_horizon/personalized tasks + GitHub-hosted training curves

Implement all audit fixes: base class, curves, README, code quality

Fix: score formatting was rounding 0.9999 to 1.000 in stdout logs

Fix: clamp all remaining hardcoded 0.0/1.0 score returns

Fix: clamp all task scores to strictly open interval (0, 1)

Add adversarial, negotiate, supply_chain tasks + dynamic difficulty + richer rewards

Add expert fraud audit task and improve inference feedback loop

Add full invoice processing pipeline environment