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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