feat(annotation): 添加文本数据集段落切片功能

- 在前端组件中新增 segmentationEnabled 字段控制切片开关
- 为文本数据集添加段落切片配置选项，默认启用切片功能
- 在后端接口中新增 segmentation_enabled 参数传递给标注项目
- 实现切片逻辑控制，支持文本数据的自动段落分割
- 添加数据集类型判断，仅文本数据集支持切片配置
- 更新标注任务创建和编辑表单中的切片相关字段处理

runtime/datamate-python/app/module/annotation/service/mapping.py

@@ -90,9 +90,11 @@ class DatasetMappingService:
         configuration = getattr(mapping, 'configuration', None) or {}
         label_config = None
         description = None
+        segmentation_enabled = None
         if isinstance(configuration, dict):
             label_config = configuration.get('label_config')
             description = configuration.get('description')
+            segmentation_enabled = configuration.get('segmentation_enabled')
 
         # Optionally fetch full template details
         template_response = None
@@ -117,6 +119,7 @@ class DatasetMappingService:
             "template_id": template_id,
             "template": template_response,
             "label_config": label_config,
+            "segmentation_enabled": segmentation_enabled,
             "total_count": total_count,
             "annotated_count": annotated_count,
             "created_at": mapping.created_at,
@@ -154,9 +157,11 @@ class DatasetMappingService:
         configuration = getattr(mapping, 'configuration', None) or {}
         label_config = None
         description = None
+        segmentation_enabled = None
         if isinstance(configuration, dict):
             label_config = configuration.get('label_config')
             description = configuration.get('description')
+            segmentation_enabled = configuration.get('segmentation_enabled')
 
         # Optionally fetch full template details
         template_response = None
@@ -184,6 +189,7 @@ class DatasetMappingService:
             "template_id": template_id,
             "template": template_response,
             "label_config": label_config,
+            "segmentation_enabled": segmentation_enabled,
             "total_count": total_count,
             "annotated_count": annotated_count,
             "created_at": mapping.created_at,
@@ -526,4 +532,4 @@ class DatasetMappingService:
         for row in rows:
             response = await self._to_response_from_row(row, include_template=include_template)
             responses.append(response)
-        return responses, total
+        return responses, total