feat(annotation): 添加标注项目文件快照功能

- 新增 LabelingProjectFile 模型用于存储标注项目的文件快照
- 在创建标注项目时记录关联的文件快照数据
- 更新查询逻辑以基于项目快照过滤文件列表
- 优化导出统计功能使用快照数据进行计算
- 添加数据库表结构支持项目文件快照关系

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

@@ -23,7 +23,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.config import settings
 from app.core.logging import get_logger
-from app.db.models import AnnotationResult, Dataset, DatasetFiles, LabelingProject
+from app.db.models import AnnotationResult, Dataset, DatasetFiles, LabelingProject, LabelingProjectFile
 from app.module.annotation.config import LabelStudioTagConfig
 from app.module.annotation.schema.editor import (
     EditorProjectInfo,
@@ -436,14 +436,18 @@ class AnnotationEditorService:
                 exclude_source_documents if exclude_source_documents is not None else True
             )
 
-        base_conditions = [DatasetFiles.dataset_id == project.dataset_id]
+        base_conditions = [
+            LabelingProjectFile.project_id == project_id,
+            DatasetFiles.dataset_id == project.dataset_id,
+        ]
         if should_exclude_source_documents:
             base_conditions.append(~self._build_source_document_filter())
 
         count_result = await self.db.execute(
-            select(func.count()).select_from(DatasetFiles).where(
-                *base_conditions
-            )
+            select(func.count())
+            .select_from(LabelingProjectFile)
+            .join(DatasetFiles, LabelingProjectFile.file_id == DatasetFiles.id)
+            .where(*base_conditions)
         )
         total = int(count_result.scalar() or 0)
 
@@ -453,6 +457,7 @@ class AnnotationEditorService:
         )
         files_result = await self.db.execute(
             select(DatasetFiles, AnnotationResult.id, AnnotationResult.updated_at)
+            .join(LabelingProjectFile, LabelingProjectFile.file_id == DatasetFiles.id)
             .outerjoin(
                 AnnotationResult,
                 (AnnotationResult.file_id == DatasetFiles.id)
@@ -827,7 +832,10 @@ class AnnotationEditorService:
 
         # 校验文件归属
         file_result = await self.db.execute(
-            select(DatasetFiles).where(
+            select(DatasetFiles)
+            .join(LabelingProjectFile, LabelingProjectFile.file_id == DatasetFiles.id)
+            .where(
+                LabelingProjectFile.project_id == project.id,
                 DatasetFiles.id == file_id,
                 DatasetFiles.dataset_id == project.dataset_id,
             )