docs: 部署说明补充数据库两条路线（空库4脚本/整套备份还原）与 init.sql 破坏性警告；备份已还原验证通过

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2026-09-13 fe5e4630e75a648f32a866b2b7a8dbffd1c25268

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package com.trafficaudit.system.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.trafficaudit.system.entity.User;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserMapper extends BaseMapper<User> {}