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docs: update setup instructions and clarify repetition mitigation strategy in README

feat: increase max_tokens to 64 and add model download instructions to README

refactor: update startup command to use app.py instead of uvicorn and add HF_TOKEN note to documentation

docs: update project documentation to reflect fine-tuned model integration and remove standalone model dependencies

feat: implement Unsloth training pipeline with Modal volumes and update documentation on model persona mitigation

feat: harden Step-Zero demo runtime and trace export