PYSEC-2026-3578 linuxfabrik-lib: fetch() forwards credential headers across a cross-origin redirect

Summary lib.url.fetch follows HTTP redirects followredirects=True. httpx strips only Authorization and Cookie when a redirect crosses the origin, so any other caller-supplied credential header a session token such as Redfish's X-Auth-Token, an API key, ... was still sent to the redirect target. A...