As outlined in #1367, the integration effort requires some rework
of existing code, which will be driven ahead by the `NodeLinkage_test`
* redefine Node Connectivity
* build simple `ProcNode` directly in scope
* create an `TurnoutSystem` instance
* perform a ''dummy Node-Invocation''
...which seems to be basically fine thus far
...beyond some renaming and rearranging
''it turns out that the final, crucial links,
necessary to tie all together, are yet to be developed''
