refactor: flatten dto entity and mapper packages

src/test/java/com/label/unit/PackageStructureMigrationTest.java

@@ -29,6 +29,39 @@ class PackageStructureMigrationTest {
         assertClassMissing("com.label.module.annotation.service.ExtractionApprovedEventListener");
     }
 
+    @Test
+    @DisplayName("DTO、实体、Mapper 已迁移到扁平数据层")
+    void dataTypesMoved() {
+        for (String fqcn : java.util.List.of(
+                "com.label.dto.LoginRequest",
+                "com.label.dto.LoginResponse",
+                "com.label.dto.UserInfoResponse",
+                "com.label.dto.TaskResponse",
+                "com.label.dto.SourceResponse",
+                "com.label.entity.AnnotationResult",
+                "com.label.entity.TrainingDataset",
+                "com.label.entity.SysConfig",
+                "com.label.entity.ExportBatch",
+                "com.label.entity.SourceData",
+                "com.label.entity.AnnotationTask",
+                "com.label.entity.AnnotationTaskHistory",
+                "com.label.entity.SysCompany",
+                "com.label.entity.SysUser",
+                "com.label.entity.VideoProcessJob",
+                "com.label.mapper.AnnotationResultMapper",
+                "com.label.mapper.TrainingDatasetMapper",
+                "com.label.mapper.SysConfigMapper",
+                "com.label.mapper.ExportBatchMapper",
+                "com.label.mapper.SourceDataMapper",
+                "com.label.mapper.AnnotationTaskMapper",
+                "com.label.mapper.TaskHistoryMapper",
+                "com.label.mapper.SysCompanyMapper",
+                "com.label.mapper.SysUserMapper",
+                "com.label.mapper.VideoProcessJobMapper")) {
+            assertClassExists(fqcn);
+        }
+    }
+
     private static void assertClassExists(String fqcn) {
         assertThatCode(() -> Class.forName(fqcn)).doesNotThrowAnyException();
     }