* feature(mobile): no longer wait for background backup in settings
migrate all Hive boxes required for the backup process to Isar
* add final modifier
* feature(mobile): sync assets, albums & users to local database on device
* try to fix tests
* move DB sync operations to new SyncService
* clear db on user logout
* fix reason for endless loading timeline
* fix error when deleting album
* fix thumbnail of device albums
* add a few comments
* fix Hive box not open in album service when loading local assets
* adjust tests to int IDs
* fix bug: show all albums when Recent is selected
* update generated api
* reworked Recents album isAll handling
* guard against wrongly interleaved sync operations
* fix: timeline asset ordering (sort asset state by created at)
* fix: sort assets in albums by created at
* refactor(mobile): add Isar DB & Store class
new Store: globally accessible key-value store like Hive (but based on Isar)
replace first few places of Hive usage with the new Store
* reduce max. DB size to prevent errors on older iOS devices
---------
Co-authored-by: Alex <alex.tran1502@gmail.com>
