feat(node): override magic number in sessions manager

This ensures that we cannot peer with older versions of the protocol

Author: aesedepece

node/src/actors/sessions_manager/actor.rs

@@ -54,8 +54,7 @@ impl Actor for SessionsManager {
                     .epoch_at(get_timestamp())
                     .unwrap_or_default();
 
-                act.sessions
-                    .set_magic_number(config.consensus_constants.get_magic());
+                act.sessions.set_magic_number(10700u16);
 
                 // The peers bootstrapping process begins upon SessionsManager's start
                 act.bootstrap_peers(ctx, bootstrap_peers_period);