Ensure that documents sync after initialization

[MaddieM4]

After initializing from any source, a document ought to sync to its current state in the network.

[MaddieM4]

Plan of attack:

• Set up one or more clients with a single router
• Each client starts with a basic transformable document
• Apply multiple changes via one of the existing clients
• Create a new client with the same starting point.
• Assert that after initialization, client is in the same state as any/all existing ones.

State to take into account:

• Document serialization

Ideally, we want to run the same test with different initial scenarios. So wrap most of the code in an assertSomething() function, maybe have the client setup in its own function as well, to make the code in the individual tests fairly high-level and low-boilerplate.