Get Impermanence Magazine available on POD platform(s) like Lulu

[rufuspollock]

This is a focused refinement of #1158

S: we have ~30 page A4 PDF for impermanence magazine created in Affinity Publisher. We want to make it available for order in physical version in as many places in the world as possible without doing the printing locally and then doing the shipping ourselves (we've done it a couple of times and overhead of effort is crazy).

C: we don't have an existing PoD solution so we don't even know if this is possible for a magazine like this. We started trying this out on Lulu and researching options but ran into some kind of error on Lulu

See full brief on https://docs.google.com/document/d/1ObJV9FLwLA4lS6JxkVApXxPBhDrY5c6PtEmIhOODVIk/edit?tab=t.0#heading=h.pmkgvsrqqc72