feat: 新增日志分组，支持按业务分组输出日志到不同目录 - #1062
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新增按业务分组（Group）将日志输出到不同目录的功能，实现类似
`LoggerFactory.getLogger(Class, String group)` 的效果。
| 文件 | 说明 |
|------|------|
| `GroupContext.java` | 基于 ThreadLocal 的分组上下文管理 |
| `GroupRoutingFilter.java` | 自定义 TurboFilter，拦截日志并注入 MDC |
| `GroupLoggerFactory.java` | 对外工具类，封装 group 设置和 Logger 获取 |
1. 业务代码调用 `GroupLoggerFactory.getLogger(Class, "order")`
2. GroupContext 将 "order" 存入 ThreadLocal
3. GroupRoutingFilter（TurboFilter）在日志事件创建前拦截，
将 ThreadLocal 中的 group 注入 MDC（key=LOG_GROUP）
4. SiftingAppender 根据 MDC 中的 LOG_GROUP 值，
动态路由到 `logs/{group}/app.log`
在 logback.xml 中配置 SiftingAppender + TurboFilter 即可生效，
无需修改业务代码的日志打印方式。
本地编译通过，单元测试通过，日志文件按 group 正确生成到不同目录。
Signed-off-by: Yoran Ye <yoran.ye@qq.com>
新增按业务分组（Group）将日志输出到不同目录的功能，实现类似
`LoggerFactory.getLogger(Class, String group)` 的效果。
| 文件 | 说明 |
|------|------|
| `GroupContext.java` | 基于 ThreadLocal 的分组上下文管理 |
| `GroupRoutingFilter.java` | 自定义 TurboFilter，拦截日志并注入 MDC | | `GroupLoggerFactory.java` | 对外工具类，封装 group 设置和 Logger 获取 |
1. 业务代码调用 `GroupLoggerFactory.getLogger(Class, "order")`
2. GroupContext 将 "order" 存入 ThreadLocal
3. GroupRoutingFilter（TurboFilter）在日志事件创建前拦截， 将 ThreadLocal 中的 group 注入 MDC（key=LOG_GROUP）
4. SiftingAppender 根据 MDC 中的 LOG_GROUP 值， 动态路由到 `logs/{group}/app.log`
在 logback.xml 中配置 SiftingAppender + TurboFilter 即可生效， 无需修改业务代码的日志打印方式。
本地编译通过，单元测试通过，日志文件按 group 正确生成到不同目录。
Signed-off-by: Yoran Ye <yoran.ye@qq.com>
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功能说明
新增按业务分组（Group）将日志输出到不同目录的功能，实现类似
LoggerFactory.getLogger(Class, String group)的效果。新增文件
GroupContext.javaGroupRoutingFilter.java工作原理
GroupLoggerFactory.getLogger(Class, "order")logs/{group}/app.log配置示例
在 logback.xml 中配置 SiftingAppender + TurboFilter 即可生效， 无需修改业务代码的日志打印方式。
验证
本地编译通过，单元测试通过，日志文件按 group 正确生成到不同目录。
Signed-off-by: yoran.ye[yoran.ye@qq.com]