[BUG] Transports using the stcp network is not saved on visor restart.

[evanlinjin]

Note that this bug only affects usage of the stcp network.

Affected branch(es): Anything above mainnet-milestone1.

To reproduce:

Run the interactive environment with the following branches:

• skywire@mainnet-milestone1
• skywire-services@feature/tcp-transport-services

And try restarting nodes in the messaging test.

Note that ssh and proxy tests would not work as they depend on visor node restarts.