Marketplace directory entries walked with lstat when realpath is unreliable, instead of being refused outright

If a plugin marketplace directory's path can't be reliably resolved to its real location (for example, because it contains a backslash on a non-Windows system), Claude Code no longer simply refuses to read it. Instead, it walks the directory tree one component at a time, checking each step to make sure it's a plain directory and not a symlink. Where the path can be resolved normally, entries are still checked by comparing their filesystem identity against the marketplace root, as before.