Print peer ID on debog when starting CLI

In order to add more context to the debug logs we print Bob's peer ID.
This allows identifying peer related logs on the ASB.

swap/src/bin/swap.rs

@@ -174,6 +174,8 @@ async fn main() -> Result<()> {
 
             let alice_peer_id = db.get_peer_id(swap_id)?;
             let mut swarm = swarm::bob(&seed, alice_peer_id)?;
+            let bob_peer_id = swarm.local_peer_id();
+            tracing::debug!("Our peer-id: {}", bob_peer_id);
             swarm
                 .behaviour_mut()
                 .add_address(alice_peer_id, alice_multiaddr);

swap/src/network/swarm.rs

@@ -19,8 +19,10 @@ where
 {
     let identity = seed.derive_libp2p_identity();
     let transport = transport::build(&identity)?;
+    let peer_id = identity.public().into_peer_id();
+    tracing::debug!("Our peer-id: {}", peer_id);
 
-    let swarm = SwarmBuilder::new(transport, behaviour, identity.public().into_peer_id())
+    let swarm = SwarmBuilder::new(transport, behaviour, peer_id)
         .executor(Box::new(|f| {
             tokio::spawn(f);
         }))