Runs OWB inside a Runpod. Reads env:

• DATABASE_URL: OWB DB URL
• RUN_KEY: run identifier to pass through
• SUBMISSION_PARAMS_JSON: JSON from scheduler
• OWB_REPO, OWB_REF: source for open-writing-bench

Behavior:

• installs vllm then upgrades transformers
• installs OWB with uv
• resolves .gguf URLs by downloading to /root/models
• runs uv run bench ...
• streams stdout/stderr to run_logs every 30s