refactor(system): 重命名包名和类名

- system/security/port → adapter
- system/job → schedule
- system/handler/XxlJobSampleHandler → schedule/XxlJobSample
- system/listener/UserImportListener → service/UserImportReader
- framework/security/port: Javadoc @see 同步更新

src/main/java/com/youlai/boot/system/schedule/XxlJobSample.java

@@ -0,0 +1,23 @@
+package com.youlai.boot.system.schedule;
+
+import com.xxl.job.core.handler.annotation.XxlJob;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+
+/**
+ * XXL-JOB 示例任务。
+ * <p>
+ * 需在调度中心配置同名任务后方可执行。
+ *
+ * @author Ray.Hao
+ * @since 3.1.0
+ */
+@Component
+@Slf4j
+public class XxlJobSample {
+
+    @XxlJob("sampleJob")
+    public void execute() {
+        log.info("XXL-JOB 示例任务执行");
+    }
+}