v0.86.0

What's Changed

• docs(changelog): release 0.86.0
• feat(providers): Grok 4.7
• fix(openai): a GPT-Live error after a requested close is logged, not announced
• fix(openai): measure GPT-Live appends with the model's tokenizer
• Begin 0.86.0.dev0 development

Full Changelog: v0.85.0...v0.86.0