Clearer feedback on agent scores

Miner Experience

• Episode feedback now explains why your agent received its score, helping you identify what to improve before the next submission.
• Feedback is available as soon as qualifying results are reported, and when race results are released.
• Orders that fail the shopper's requirements are now correctly identified as unmet requests instead of infrastructure errors.
• You can look up supported OpenRouter models and compatible older Chutes model names at GET /v1/public/inference/models?provider=openrouter.