Compatibility update — five pinned clients checked against Infer's Responses API

Infer’s dated compatibility matrix now covers Codex CLI 0.146.0, OpenCode 1.18.16, Pydantic AI 2.27.1, langchain-openai 1.4.3, and AI SDK 7.0.59 with @ai-sdk/openai 4.0.37. It separates configuration, direct Responses calls, SSE, local tool loops, structured output, session affinity, live routing, and dated availability; it does not claim native-provider status, certification, future-version support, or supplier attestation.