Save File Shortcut Action (iOS) erros on Videos

### Summary

I am using a shortcut to upload my iOS camera library to my cryptomator vault. Since the last iOS update to 26 this shortcut fails when trying to upload videos.

### Please agree to the following

- [x] I have searched [existing issues](https://github.com/cryptomator/ios/issues?q=) for duplicates
- [x] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/ios/blob/develop/.github/CODE_OF_CONDUCT.md)

### System Setup

- iOS: 26.2.1
- Cryptomator: 2.8.3

### Cloud Type

WebDAV

### Steps to Reproduce

Using the Automatic Photo Upload from this guide:
https://docs.cryptomator.org/ios/shortcuts-guide/

### Expected Behavior

Up until the latest iOS upgrade the shortcut uploaded Photos and Videos without issues.

### Actual Behavior

Now the shortcut errors out on videos showing
"The provided file is not valid".
Photos are working fine.


### Reproducibility

Always

### Relevant Log Output

```shell

```

### Anything else?

also mentioned here:

https://www.reddit.com/r/Cryptomator/comments/1om5agy/cryptomator_ios_shortcut_refusing_to_save_videos/
https://community.cryptomator.org/t/shortcuts-auto-upload-can-t-upload-movies/17280