Archive links lead to 'not found' page when individual tracking is enabled

[sonologic]

Version:

• listmonk: v2.4.0
• OS: docker container (listmonk/listmonk:latest)

Description of the bug and steps to reproduce:

When 'Individual subscriber tracking' is enabled, TrackingLinks in archived campaigns will lead to a 'not found' json response instead of linking through to the target url.

Steps to reproduce:

1. Enable 'Individual subscriber tracking'
2. Set up a list
3. Create a campaign with a TrackLink, enable public archiving of campaign with 'Campaign metadata' set to {}
4. Send out campaign
5. Go to public archive
6. Click the tracked link

Screenshots:

[sonologic]

I figured out I can work-around this issue by creating a dummy user and use that user's UUID in the 'Campaign metadata':

{ "UUID": "5a837423-a186-5623-9a87-82691cbe3631" }

[sonologic]

I noticed a distinct lack of documentation on the archive feature. I'll try to write some and create an MR, including the use of campaign metadata.