Version 3.31: sqlite error: duplicate column name (offline_operations_modified_at)

### ⚠️ 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. Update to 3.31.0 RC1
2. Try to launch the app

### Expected behaviour

App launches.

### Actual behaviour

App crashes.

### Android version

15

### Device brand and model

Google Pixel 7

### Stock or custom OS?

Stock

### Nextcloud android app version

3.31.0 RC1

### Nextcloud server version

30.0.2

### Using a reverse proxy?

Yes

### Android logs

[logcat.txt](https://github.com/user-attachments/files/18547596/logcat.txt)

### Server error logs

```bash

```

### Additional information

```text
SQLiteLog: (1) duplicate column name: offline_operations_modified_at in "ALTER TABLE `offline_operations` ADD COLUMN `offline_operations_modified_at` INTEGER DEFAULT NULL"
```