[fix](ccr) handle large binlog (#30435)

fe/fe-common/src/main/java/org/apache/doris/common/Config.java

@@ -2145,6 +2145,11 @@ public class Config extends ConfigBase {
             "Whether to enable binlog feature"})
     public static boolean enable_feature_binlog = false;
 
+    @ConfField(mutable = false, masterOnly = false, varType = VariableAnnotation.EXPERIMENTAL, description = {
+        "设置 binlog 消息最字节长度",
+        "Set the maximum byte length of binlog message"})
+    public static int max_binlog_messsage_size = 1024 * 1024 * 1024;
+
     @ConfField(mutable = true, masterOnly = true, description = {
             "是否禁止使用 WITH REOSOURCE 语句创建 Catalog。",
             "Whether to disable creating catalog with WITH RESOURCE statement."})