Logging further variables (e.g. reactive variables defined in the server part)

I want to log variables that aren't inputs or outputs or session information (e.g. url variable fetched with `session$clientData$url_search` or reactive values completed as auxiliary variables in the server). Is there a workaround for this need?

Start by tracing how shinylogs currently identifies inputs, outputs, and session information, then compare that with the examples in the issue: session$clientData$url_search and server-side reactive values. Done means there is a clearly supported way to log these additional variables, with the expected behavior documented or verified.

Written by the indexing model from the issue text.