ci: fix version extraction for BusyBox shell; use PHP fallback

    echo "Deriving package version from appinfo/info.xml ..."

    RAW_VERSION=$(xmllint --xpath 'string(/info/version)' appinfo/info.xml 2>/dev/null || true)

    if [ -z "${RAW_VERSION:-}" ]; then

      RAW_VERSION=$(grep -oP '<version>\K[^<]+' appinfo/info.xml | head -n1 || true)

      RAW_VERSION=$(php -r '$x=@simplexml_load_file("appinfo/info.xml"); if(!$x||empty($x->version)){exit(1);} echo $x->version, PHP_EOL;' 2>/dev/null || true)

    fi

    if [ -z "${RAW_VERSION:-}" ]; then

      echo "Could not extract version from appinfo/info.xml" >&2