feat: streaming structured output across openai/openrouter/grok/groq + summarize fix#527

tombeckenham wants to merge 10 commits into

543-migrate-ai-groq-ai-openrouter-ai-ollama-to-openai-base-+-parameterize-the-base-for-sdk-shape-varianceTanStack/ai:543-migrate-ai-groq-ai-openrouter-ai-ollama-to-openai-base-+-parameterize-the-base-for-sdk-shape-variancefrom

526-featai-openrouter-support-streaming-structured-output-response_format-json_schema-with-stream-trueTanStack/ai:526-featai-openrouter-support-streaming-structured-output-response_format-json_schema-with-stream-trueCopy head branch name to clipboard