feat(store): add TaskStore CRUD and batch query methods for files and blobs

internal/store/blob_store.go

@@ -82,6 +82,15 @@ func (s *BlobStore) Delete(ctx context.Context, sha256 string) error {
 	return nil
 }
 
+func (s *BlobStore) GetBySHA256s(ctx context.Context, sha256s []string) ([]model.FileBlob, error) {
+	var blobs []model.FileBlob
+	if len(sha256s) == 0 {
+		return blobs, nil
+	}
+	err := s.db.WithContext(ctx).Where("sha256 IN ?", sha256s).Find(&blobs).Error
+	return blobs, err
+}
+
 // GetBySHA256ForUpdate returns the FileBlob with a SELECT ... FOR UPDATE lock.
 // Returns (nil, nil) if not found.
 func (s *BlobStore) GetBySHA256ForUpdate(ctx context.Context, tx *gorm.DB, sha256 string) (*model.FileBlob, error) {