Map Hermes xhigh→max to unlock DeepSeek V4's 'Max thinking' tier
through Ollama Cloud's OpenAI-compatible /v1/chat/completions endpoint.
low/medium/high pass through unchanged; disabled/none suppress
reasoning entirely.
Empirically confirmed: reasoning_effort:max produces ~2.5× more
thinking tokens than high on deepseek-v4-pro:cloud (1576 vs 642).