feat(count): 实现评论计数功能支持二级评论统计

- 新增评论数据对象 CommentDO 及其 MyBatis 映射配置
- 新增评论级别枚举 CommentLevelEnum 区分一级与二级评论
- 新增 CountNoteChildCommentConsumer 消费 MQ 消息并更新子评论总数
- 修改 CountPublishCommentMqDTO 增加 level 和 parentId 字段以支持层级识别
- 调整 Comment2DBConsumer 中构造 CountPublishCommentMqDTO 的逻辑，使用 commentBO 提取完整信息
- 配置 MyBatis Code Helper 插件指向新的 han-note-count 模块路径
- 更新 gateApi.http 测试接口示例，添加 replyCommentId 参数用于模拟二级评论发布

han-note-count/han-note-count-biz/src/main/resources/mapperxml/CommentDOMapper.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.hanserwei.hannote.count.biz.domain.mapper.CommentDOMapper">
+    <resultMap id="BaseResultMap" type="com.hanserwei.hannote.count.biz.domain.dataobject.CommentDO">
+        <!--@mbg.generated-->
+        <!--@Table t_comment-->
+        <id column="id" jdbcType="BIGINT" property="id"/>
+        <result column="note_id" jdbcType="BIGINT" property="noteId"/>
+        <result column="user_id" jdbcType="BIGINT" property="userId"/>
+        <result column="content_uuid" jdbcType="VARCHAR" property="contentUuid"/>
+        <result column="is_content_empty" jdbcType="BIT" property="isContentEmpty"/>
+        <result column="image_url" jdbcType="VARCHAR" property="imageUrl"/>
+        <result column="level" jdbcType="TINYINT" property="level"/>
+        <result column="reply_total" jdbcType="BIGINT" property="replyTotal"/>
+        <result column="like_total" jdbcType="BIGINT" property="likeTotal"/>
+        <result column="parent_id" jdbcType="BIGINT" property="parentId"/>
+        <result column="reply_comment_id" jdbcType="BIGINT" property="replyCommentId"/>
+        <result column="reply_user_id" jdbcType="BIGINT" property="replyUserId"/>
+        <result column="is_top" jdbcType="TINYINT" property="isTop"/>
+        <result column="create_time" jdbcType="TIMESTAMP" property="createTime"/>
+        <result column="update_time" jdbcType="TIMESTAMP" property="updateTime"/>
+        <result column="child_comment_total" jdbcType="BIGINT" property="childCommentTotal"/>
+    </resultMap>
+    <sql id="Base_Column_List">
+        <!--@mbg.generated-->
+        id,
+        note_id,
+        user_id,
+        content_uuid,
+        is_content_empty,
+        image_url,
+        `level`,
+        reply_total,
+        like_total,
+        parent_id,
+        reply_comment_id,
+        reply_user_id,
+        is_top,
+        create_time,
+        update_time,
+        child_comment_total
+    </sql>
+
+    <update id="updateChildCommentTotal" parameterType="map">
+        update t_comment
+        set child_comment_total = child_comment_total + #{count},
+            update_time         = now()
+        where id = #{parentId}
+          and level = 1
+    </update>
+</mapper>