docs_getter

Expose and extend the doc_getter crawler as a public docs-to-ZIP service with a Next.js frontend (`getdoc.tool.txzy.net`) and a FastAPI backend (`api.tool.getdoc.txzy.net`). Use when asked to add or modify crawl APIs, Swagger/OpenAPI docs, async job polling, ZIP download flows, temporary file cleanup, deployment behavior, or the one-field public UI where users only submit a docs URL.