* fix(network): add a send timeout to outbound peer messages
* test(network): test peer send and receive timeouts
And the equivalent success cases:
- spawn the run loop with no messages
- spawn the run loop and send and receive a message
* test(network): check for specific error types in the tests
And add an outbound error test that doesn't expect a response.
* test(network): use bounded fake peer connection channels
This lets us actually trigger send timeouts in the tests.
* refactor(network): rename some confusing types and variables
fastmod peer_inbound_tx peer_tx zebra*
fastmod peer_inbound_rx peer_rx zebra*
fastmod ClientSendTimeout ConnectionSendTimeout zebra*
fastmod ClientReceiveTimeout ConnectionReceiveTimeout zebra*
* doc(network test): explain the purpose of each peer connection test vector
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