chore: update OpenAI model presets

[c121914yu]

Summary

• Add OpenAI GPT-5.6 model presets: gpt-5.6, gpt-5.6-sol, gpt-5.6-terra, and gpt-5.6-luna.
• Keep the presets ordered newest-first and reuse the existing GPT-5.5 family capability fields.

Evidence

• Official OpenAI model docs: https://platform.openai.com/docs/models
• Checked on 2026-07-12.

Validation

• node .codex/skills/model-provider-updater/scripts/model_provider_presets.mjs inventory --provider OpenAI
• pnpm exec eslint packages/infrastructure/src/static-data/models/provider/OpenAI/index.ts
• git diff --check
• pnpm exec tsx -e "...import OpenAI provider and assert GPT-5.6 models..."

Known existing validation failures

• bun tsc --noEmit currently fails in sdk/factory with existing Zod API/version errors (GlobalMeta, .meta, toJSONSchema).
• bun run test currently fails one existing sdk/factory/src/tool-factory.test.ts schema metadata test for z.string().meta is not a function; it also warns that .env.test is missing.

[Copilot]

Pull request overview

Updates the OpenAI provider static model inventory by adding the new GPT-5.6 family presets, keeping the list ordered newest-first and aligned with the existing GPT-5.5 capability fields used throughout the provider config.

Changes:

• Added four new OpenAI LLM presets: gpt-5.6, gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna.
• Placed the new presets at the top of the OpenAI model list (newest-first).
• Reused the existing GPT-5.5-style capability metadata (context/tokens/vision/reasoning/tool choice/response formats).

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