Detect invoices from download URLs included in the email

Some providers might not send the invoice as attachment but include a download URL for the invoice

Update from 8.05.2026:

No timeline right now, the issues with it are in several things:

1. authorization: for most of the cases, documents are available after authorization, because we don’t save any passwords, we don’t pass them.

2. security reasons: links can lead to phishing websites and malware, so it can be dangerous both for users and our service as well.