feat(database): 迁移统计数据查询到ClickHouse

- 添加ClickHouse数据源配置和相关依赖
- 实现ClickHouse统计查询服务和MySQL兜底方案
- 新增扫码统计、订单统计等数据查询接口
- 重构分销员数据统计逻辑，整合MySQL和ClickHouse数据源
- 更新应用配置文件以支持ClickHouse启用开关
- 修改分布式任务统计以支持跨库查询场景

src/main/java/com/ycwl/basic/config/ClickHouseDataSourceConfig.java

@@ -0,0 +1,56 @@
+package com.ycwl.basic.config;
+
+import com.zaxxer.hikari.HikariDataSource;
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.mybatis.spring.SqlSessionFactoryBean;
+import org.mybatis.spring.SqlSessionTemplate;
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+
+import javax.sql.DataSource;
+
+/**
+ * ClickHouse 数据源配置
+ * 用于 t_stats 和 t_stats_record 表的查询
+ */
+@Configuration
+@ConditionalOnProperty(prefix = "clickhouse", name = "enabled", havingValue = "true")
+@MapperScan(
+        basePackages = "com.ycwl.basic.clickhouse.mapper",
+        sqlSessionFactoryRef = "clickHouseSqlSessionFactory"
+)
+public class ClickHouseDataSourceConfig {
+
+    @Bean(name = "clickHouseDataSource")
+    @ConfigurationProperties(prefix = "clickhouse.datasource")
+    public DataSource clickHouseDataSource() {
+        return new HikariDataSource();
+    }
+
+    @Bean(name = "clickHouseSqlSessionFactory")
+    public SqlSessionFactory clickHouseSqlSessionFactory(
+            @Qualifier("clickHouseDataSource") DataSource dataSource) throws Exception {
+        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
+        factoryBean.setDataSource(dataSource);
+        factoryBean.setMapperLocations(
+                new PathMatchingResourcePatternResolver()
+                        .getResources("classpath:mapper/clickhouse/*.xml")
+        );
+        // 配置 MyBatis 设置
+        org.apache.ibatis.session.Configuration configuration = new org.apache.ibatis.session.Configuration();
+        configuration.setMapUnderscoreToCamelCase(true);
+        factoryBean.setConfiguration(configuration);
+        return factoryBean.getObject();
+    }
+
+    @Bean(name = "clickHouseSqlSessionTemplate")
+    public SqlSessionTemplate clickHouseSqlSessionTemplate(
+            @Qualifier("clickHouseSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
+        return new SqlSessionTemplate(sqlSessionFactory);
+    }
+}