feat(annotation): implement file version management for annotation feature

Add support for detecting new file versions and switching to them:

Backend Changes:
- Add file_version column to AnnotationResult model
- Create Alembic migration for database schema update
- Implement check_file_version() method to compare annotation and file versions
- Implement use_new_version() method to clear annotations and update version
- Update upsert_annotation() to record file version when saving
- Add new API endpoints: GET /version and POST /use-new-version
- Add FileVersionCheckResponse and UseNewVersionResponse schemas

Frontend Changes:
- Add checkFileVersionUsingGet and useNewVersionUsingPost API calls
- Add version warning banner showing current vs latest file version
- Add 'Use New Version' button with confirmation dialog
- Clear version info state when switching files to avoid stale warnings

Bug Fixes:
- Fix previousFileVersion returning updated value (save before update)
- Handle null file_version for historical data compatibility
- Fix segmented annotation clearing (preserve structure, clear results)
- Fix files without annotations incorrectly showing new version warnings
- Preserve total_segments when clearing segmented annotations

Files Modified:
- frontend/src/pages/DataAnnotation/Annotate/LabelStudioTextEditor.tsx
- frontend/src/pages/DataAnnotation/annotation.api.ts
- runtime/datamate-python/app/db/models/annotation_management.py
- runtime/datamate-python/app/module/annotation/interface/editor.py
- runtime/datamate-python/app/module/annotation/schema/editor.py
- runtime/datamate-python/app/module/annotation/service/editor.py

New Files:
- runtime/datamate-python/alembic.ini
- runtime/datamate-python/alembic/env.py
- runtime/datamate-python/alembic/script.py.mako
- runtime/datamate-python/alembic/versions/20250205_0001_add_file_version.py

frontend/src/pages/DataAnnotation/annotation.api.ts

@@ -88,7 +88,7 @@ export function getEditorTaskSegmentUsingGet(
   return get(`/api/annotation/editor/projects/${projectId}/tasks/${fileId}/segments`, params);
 }
 
-export function upsertEditorAnnotationUsingPut(
+export function upsertEditorAnnotationUsingPut(
   projectId: string,
   fileId: string,
   data: {
@@ -97,8 +97,31 @@ export function upsertEditorAnnotationUsingPut(
     segmentIndex?: number;
   }
 ) {
-  return put(`/api/annotation/editor/projects/${projectId}/tasks/${fileId}/annotation`, data);
-}
+  return put(`/api/annotation/editor/projects/${projectId}/tasks/${fileId}/annotation`, data);
+}
+
+export interface FileVersionCheckResponse {
+  fileId: string;
+  currentFileVersion: number;
+  annotationFileVersion: number | null;
+  hasNewVersion: boolean;
+}
+
+export function checkFileVersionUsingGet(projectId: string, fileId: string) {
+  return get(`/api/annotation/editor/projects/${projectId}/files/${fileId}/version`);
+}
+
+export interface UseNewVersionResponse {
+  fileId: string;
+  previousFileVersion: number | null;
+  currentFileVersion: number;
+  message: string;
+}
+
+export function useNewVersionUsingPost(projectId: string, fileId: string) {
+  return post(`/api/annotation/editor/projects/${projectId}/files/${fileId}/use-new-version`, {});
+}
+
 
 // =====================
 // 标注数据导出