fix(docker-exec-via-sock): 将 printf 替换为 echo 以简化错误输出

docker-exec-via-sock.sh

@@ -201,6 +201,6 @@ else
   log "command failed with exit code $exit_code"
   log "output from container:"
   # 将错误输出打印到 stderr
-  printf '%s\n' "$output" >&2
+  echo "$output" >&2
   exit "$exit_code"
 fi