Update .puml and .svg in docs directory

The current .svg showing the materialized views, views etc. is out-of-date and we should update it accordingly. E.g. the last update in the doc dir was in May 2024, while the bwauth cdf materialized views landed in October that year or later.

We should wait for #52 (closed) being fixed first, though. Once we are happy we with that one we can update the docs and fix other, smaller bugs there as well in case we need to.