Fix verbose add_initial_peers logs (#3019)

And update some function docs.

zebra-network/src/peer_set/initialize.rs

@@ -228,7 +228,9 @@ where
 
 /// Use the provided `outbound_connector` to connect to the configured initial peers,
 /// then send the resulting peer connections over `peerset_tx`.
-#[instrument(skip(config, outbound_connector, peerset_tx))]
+///
+/// Sends any unused initial peers to the `address_book_updater`.
+#[instrument(skip(config, outbound_connector, peerset_tx, address_book_updater))]
 async fn add_initial_peers<S>(
     config: Config,
     outbound_connector: S,
@@ -360,7 +362,9 @@ where
 /// Limit the number of `initial_peers` addresses entries to the configured
 /// `peerset_initial_target_size`.
 ///
-/// The result is randomly chosen entries from the provided set of addresses.
+/// Returns randomly chosen entries from the provided set of addresses.
+///
+/// Sends any unused entries to the `address_book_updater`.
 async fn limit_initial_peers(
     config: &Config,
     mut address_book_updater: mpsc::Sender<MetaAddrChange>,

zebra-state/src/service.rs

@@ -500,7 +500,7 @@ impl StateService {
             .collect();
         res.reverse();
 
-        tracing::info!(
+        tracing::debug!(
             ?final_height,
             response_len = ?res.len(),
             ?chain_tip_height,