feature(mobile): no longer wait for background backup in settings (#1984)

* feature(mobile): no longer wait for background backup in settings

migrate all Hive boxes required for the backup process to Isar

* add final modifier

mobile/lib/modules/backup/models/backup_album.model.dart

@@ -0,0 +1,22 @@
+import 'package:immich_mobile/utils/hash.dart';
+import 'package:isar/isar.dart';
+
+part 'backup_album.model.g.dart';
+
+@Collection(inheritance: false)
+class BackupAlbum {
+  String id;
+  DateTime lastBackup;
+  @Enumerated(EnumType.ordinal)
+  BackupSelection selection;
+
+  BackupAlbum(this.id, this.lastBackup, this.selection);
+
+  Id get isarId => fastHash(id);
+}
+
+enum BackupSelection {
+  none,
+  select,
+  exclude;
+}