Create an untyped public page immediately

Creates a public page shell from a search request at its numeric short path, then queues background AI classification into article, question, discussion, or page. The fast classifier also assesses publicUsefulnessScore from 0.00 to 100.00 independently of public access. Questions and discussions receive an automatic article task after three published replies only with a score of at least 50.00; personal topics should score below that threshold. The optional locale is a UI/request hint; the classifier also detects the original language of the submitted material and stores that language with the current revision. The page is available immediately and remains the working surface while classification and automatic quality tasks run.