GHSA-R557-WFFQ-WVRC @astrojs/node: Backslash-prefixed paths not recognized as internal by trailing-slash redirect

Impact With trailingSlash: 'always' configured, the @astrojs/node standalone server's static file handler appends a trailing slash to request paths and issues a 301 redirect. Paths beginning with /\ slash-backslash were not recognized as internal paths, so the handler would echo the raw path back...