Auto-upload intermittently misses photos when multiple pictures are taken in quick succession

### ⚠️ Before posting ⚠️

- [x] This is a **bug**, not a question or an enhancement.
- [x] I've [searched for similar issues](https://github.com/nextcloud/android/issues) and didn't find a duplicate.
- [x] I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/).

### Steps to reproduce

1. Take several pictures with your smartphone within a short period of time (e.g. 1 minute)
2. Wait for the auto-upload to trigger and to complete the upload
3. Find a random (?) subset of photos missing in the remote folder (e.g. only 8/13 pictures were uploaded)

### Expected behaviour

Every picture saved to an auto-upload enabled folder on the phone should be uploaded (within a reasonable timeframe)

### Actual behaviour

Some photos are not uploaded. There are no failed upload jobs in the queue and retriggering the upload process is not possible/extremly cumbersome.

### Android version

14

### Device brand and model

Galaxy A54 5G

### Stock or custom OS?

Stock

### Nextcloud android app version

3.31.1

### Nextcloud server version

31.0.2

### Using a reverse proxy?

Yes

### Android logs

_No response_

### Server error logs

```bash

```

### Additional information

I took the liberty to raise this issue separately from the meta-issue concerning the Google revoked file system privileges. I suspect this is to be only losely connected because upload of pictures has started working again in recent versions of the app (playstore version). Adding the option to manually trigger a rescan of the upload folder would be helpful as well.