✨ Introduce undownloaded events feature

Add functionality to filter and display events that are queued for deletion but have not been downloaded. Update relevant views and controllers to support this new feature. ✨ Introduce undownloaded events feature Add a new route and view for displaying events queued for deletion that have not been downloaded. Update event deletion logic to reflect a 30-day retention period before actual deletion. ♻️ Refactor event archival and deletion logging Optimize event deletion and archival methods by removing unnecessary count increments and improving logging messages for clarity. 💄 Update days remaining display in email templates Use pluralization for days remaining to enhance clarity in user notifications.