Questions
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* Idea for a homogeneous ID for node (can we expose primary key from postgres)
* Why the visit status is a paginated list in storage?, and not in v1
* visit id should be visit number
... Schema related questions 

* What should we include in pageinfo (start token, haspreviouspage etc)
* Query cost calculator logic (could be a bit complex)
* Throttling based on Query cost calculator
* Authentication and Authorization

* Datetime as a time stamp
* Other scalar types needed (swhid)
