fix(mqtt): adapt keepalive_check_interval

src/schemaText/schema-text-en.json

@@ -1361,6 +1361,10 @@
     "client_attrs_init_expression": {
       "label": "Attribute Expression",
       "desc": "A single-line expression that dynamically extracts attribute values from existing client information can use the following fields:<br/><br/>- `clientid`: client ID<br/>- `username`: user name<br/>- `cn`: CN field of TLS certificate<br/>- `dn`: DN field of TLS certificate<br/>- `user_property.*`: extracts the property value from the `User-Property` of the MQTT CONNECT packet, e.g. `user_property.foo`<br/><br/>You can use predefined string functions to dynamically process the information. For example, to extract the prefix of a dot-separated client ID: `nth(1, tokens(clientid, '.'))`; to extract a partial username: `substr(username, 0, 5)`. You can read more about variform expressions in EMQX docs.<br/>"
+    },
+    "mqtt_keepalive_check_interval": {
+      "label": "Keep Alive Check Interval",
+      "desc": "The frequency of checking for incoming MQTT packets determines how often the server will check for new MQTT packets.<br />If a certain amount of time passes without any packets being sent from the client, this time will be added up.<br />Once the accumulated time exceeds `keepalive-interval * keepalive-multiplier`, the connection will be terminated.<br />The default is set to 30 seconds, with a minimum value of 1 second and a maximum value of `keepalive-interval / 2`.<br />"
     }
   }
 }

src/schemaText/schema-text-zh.json

@@ -1357,6 +1357,10 @@
     "client_attrs_init_expression": {
       "label": "属性表达式",
       "desc": "一个行表达式，用于从客户端现有信息中动态提取属性值，可以使用以下字段：<br/><br/>- `clientid`：客户端 ID<br/>- `username`：用户名<br/>- `cn`：TLS 证书的 CN 字段<br/>- `dn`：TLS 证书的 DN 字段<br/>- `user_property.*`：从 MQTT CONNECT 数据包的 `User-Property` 中提取属性值，例如 `user_property.foo`<br/><br/>支持使用预定义的字符串函数对信息进行动态处理。例如，要提取由点分隔的客户端 ID 的前缀：`nth(1, tokens(clientid, '.'))`；要截取用户名部分信息：`substr(username, 0, 5)`。您可以在 EMQX 文档中了解有关 variform 表达式的更多信息。<br/>"
+    },
+    "mqtt_keepalive_check_interval": {
+      "label": "保活检查间隔",
+      "desc": "检查传入 MQTT 数据包的频率决定了服务器检查新 MQTT 数据包的频率。<br />如果客户端在一定时间内没有发送任何数据包，这段时间将会累积。<br />一旦累积时间超过 `keepalive-interval * keepalive-multiplier`，连接将会被终止。<br />默认值设置为 30 秒，最小值为 1 秒，最大值为 `keepalive-interval / 2`。"
     }
   }
 }