As a developer, i would love to provide the most convenient way possible to have apps integrations, that works just like magic.
What you have proposed, is very great, however, if you readd through this discussions, this was vehemently opposed here Defining Shared Folder Access Volume - Development - NethServer Community
option 4 is where things breaks, unless you have a way around.
the shared articles are mainly for building knowledge graph in getting these done, as with time, we tend to forget links and sources