v0.47.1

• Retried HTTP errors honor Retry-After. A retryable status (the AI Mode and SERP capacity 503 included) now waits for the server's Retry-After — delay-seconds or an HTTP-date, including the obsolete asctime form read as UTC — without shortening the existing exponential backoff, retry limits or status policy. 429 still raises RateLimitError with the parsed delay; a malformed header falls back to the previous behaviour.