Changes to Web search calls

added the optional property data/items/results/items/oneOf[#/components/schemas/UsageCompletionsResult]/input_cache_write_30m_tokens to the response with the 200 status

added the optional property error/anyOf[#/components/schemas/Error]/misalignment/review_target to the response with the 403 status

added the optional property error/misalignment/review_target to the response with the 400 status

added the optional property error/misalignment/review_target to the response with the 429 status

endpoint added