Fix Kimi K3 temperature support for OpenCode Go - #3328

Summary

Mark OpenCode Go's Kimi K3 as temperature = false. The base model currently advertises temperature support, so clients send the field and OpenCode Go rejects the request upstream.

This does not change reasoning support; the resolved model still exposes the max effort variant.

Evidence

• Reproduced against OpenCode Go with identical Kimi K3 max requests: temperature: 0.2 returned HTTP 400, while omitting temperature completed successfully.
• Related report: Kimi K3 works as primary but OpenCode Go rejects subagent requests with 400 opencode#37552
• The same base model's OpenRouter entry also disables temperature: https://github.com/anomalyco/models.dev/blob/dev/providers/openrouter/models/moonshotai/kimi-k3.toml

Validation

• bun validate
• Resolved catalog: temperature: false, reasoning effort values: ["max"]