通信中间件，下行命令增加一倒计次属性，以实现延迟发送命令。

liurunyu

2025-01-22 ec67f42b0c95e1967def5ce9c86f9ca10df53505

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distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.5/apache-maven-3.9.5-bin.zip
wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar