docs(embeddings/openai): credential params require the openai_ prefix; embeddings have no max_concurrency knob The OpenAI embedding provider reads its credential params only under their openai_-prefixed names since v2.1.0, never reads max_concurrency, and retries a wider set of statuses than documented.

docs(embeddings/openai): credential params require the openai_ prefix; embeddings have no max_concurrency knob The OpenAI embedding provider reads its credential params only under their openai_-prefixed names since v2.1.0, never reads max_concurrency, and retries a wider set of statuses than documented.