Crash deleting episode media

### Checklist - [X] I have used the search function for [**OPEN**](https://github.com/XilinJia/Podcini/issues) issues to see if someone else has already submitted the same bug report. - [X] I have **also** used the search function for [**CLOSED**](https://github.com/XilinJia/podcini/issues?q=is%3Aissue+is%3Aclosed) issues to see if the problem is already solved and just waiting to be released. - [X] I will describe the problem with as much detail as possible. - [X] If the bug only to occurs with a certain podcast, I will include the URL of that podcast. ### App version 7.3.0 ### Where did you get the app from Other ### Android version Android 15 GrapheneOS ### Device model Pixel 7 Pro ### First occurred Today ### Steps to reproduce 1. Go to Episodes 2. Select `Downloaded` from the dropdown 3. Select episodes to delete 4. Tap pencil, delete episode media 5. Wait for crash ### Expected behaviour Delete the selected episodes. ### Current behaviour It crashed. I think some of these episodes are set as downloaded in the database but are missing/broken. ### Logs [full-logs.txt](https://github.com/user-attachments/files/18353340/full-logs.txt) [Error in Podcini.R dbf4f054531f.txt](https://github.com/user-attachments/files/18353341/Error.in.Podcini.R.dbf4f054531f.txt)