6dad5c3b17
As discovered in https://github.com/openai/codex/issues/1365, the Azure provider needs to be able to specify `api-version` as a query param, so this PR introduces a generic `query_params` option to the `model_providers` config so that an Azure provider can be defined as follows: ```toml [model_providers.azure] name = "Azure" base_url = "https://YOUR_PROJECT_NAME.openai.azure.com/openai" env_key = "AZURE_OPENAI_API_KEY" query_params = { api-version = "2025-04-01-preview" } ``` This PR also updates the docs with this example. While here, we also update `wire_api` to default to `"chat"`, as that is likely the common case for someone defining an external provider. Fixes https://github.com/openai/codex/issues/1365.