Progress lost if you close app while running "Upload the whole camera roll"

Steps to reproduce

1. Run "Upload the whole camera roll"
2. Launch different app (this one still runs in background)
3. It loses the progress when you come back and you have to restart auto-upload

Expected behaviour

When syncing large libraries, loosing the progress is something that you don't want to happen.

My library has over 10000 photos and besides that the phone gets very hot while processing i accidentally closed the app and lost it.

In the current form this feature seems inefficient.

Can't you keep the progress and give option to continue or restart when app is relaunched?

Actual behaviour

The app loses the progress when you close and auto upload is running

Screenshots

Not applicable

Logs

Not applicable

Reasoning or why should it be changed/implemented?

Environment data

iOS version: e.g. iOS 17.5

Nextcloud iOS app version: Nextcloud Hydrogen 5.3.2.0

Server operating system:

Web server: Nginx

Database: Mysql

PHP version: PHP 8.2

Nextcloud version: 28.0.1

No source files, tests, or entry points are identified in the report. Start by reproducing the lost-progress behavior while uploading a large camera roll, then trace how the upload state is handled when the app is relaunched. Done means a user can continue or restart the interrupted upload without losing progress.