Display Bug on All Subscriptions Page in Castopod 1.8.2 via Docker: Only Oldest Subscription Visible
### Describe the bug
When using Castopod 1.8.2 through Docker, there's an issue with the All Subscriptions page. Only the oldest valid subscription is displayed, even though multiple active subscriptions exist.
### Steps to reproduce
1. Add multiple subscriptions in Castopod 1.8.2.
1. Navigate to the All Subscriptions page.
1. Observe that only the oldest subscription is visible.
### Expected behavior
The All Subscriptions page should display all active subscriptions.
### Actual behavior
Only the oldest subscription is displayed on the All Subscriptions page. Other subscriptions are accessible and can be managed by manually entering their URLs, confirming their active status.
### Relevant logs and/or screenshots
### Context
- Castopod: 1.8.2 Docker
- OS: Ubuntu 20.04.6 LTS
- Browser: Firefox
- Web server: Whichever is bundled with castopod/castopod:latest
### Possible fixes
Sorry, I'm not a developer. /shrug
issue