feat: migrate backup albums to sqlite (#20049)

* do not migrate again on app start

* migrate backup albums over to sqlite

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/entities/backup_album.entity.dart

@@ -13,6 +13,18 @@ class BackupAlbum {
   BackupAlbum(this.id, this.lastBackup, this.selection);
 
   Id get isarId => fastHash(id);
+
+  BackupAlbum copyWith({
+    String? id,
+    DateTime? lastBackup,
+    BackupSelection? selection,
+  }) {
+    return BackupAlbum(
+      id ?? this.id,
+      lastBackup ?? this.lastBackup,
+      selection ?? this.selection,
+    );
+  }
 }
 
 enum BackupSelection {