Feature: Connect & Query multiple DBs

[Jonarod]

API

Python

Description

Would love to see the ability to connect to & query multiple DBs at the same time.

It would allow to:

1. Have the flexibility to design graphs as separated as needed. Instead of designing DBs as 1 big graph, we could start thinking graphs as standalone DBs.
2. Split one DB into multiple DBs, while still having the possibility to query all the DBs as 1 whole.
3. Help introduce some level of "role based user access" patterns, by having one DB per user for example, and let the application layer route transactions to the relevant DB for this user. (or all sorts of logical separation of concerns)
4. Help with scaling and load balancing: we could easily deploy DBs across multiple nodes/servers