message: Add more logging to synchronizer.
diff: @@ -6,7 +6,7 @@ use std::{
  use datasize::DataSize;
  use itertools::Itertools;
  -use tracing::debug;
  +use tracing::{debug, info};
  use crate::{
  components::consensus::{
  @@ -389,6 +389,10 @@ impl<I: NodeIdT, C: Context + 'static> Synchronizer<I, C> {
  .flatten()
  .find(|(vv, _)| vv.inner().id() == transitive_dependency)
  {
  + info!(
  + dependency = ?transitive_dependency, %sender,
  + "adding sender as a source for proposal"
  + );
  let dep_pv = PendingVertex::new(sender, vv.clone().into(), time_received);
  // We found the next vertex to add.
  if !self.vertices_no_deps.is_empty() {
  @@ -407,6 +411,7 @@ impl<I: NodeIdT, C: Context + 'static> Synchronizer<I, C> {
  continue;
  }
  // Otherwise request the missing dependency from the sender.
  + info!(dependency = ?transitive_dependency, %sender, "requesting dependency");
  let ser_msg = HighwayMessage::RequestDependency(transitive_dependency).serialize();
  outcomes.push(ProtocolOutcome::CreatedTargetedMessage(ser_msg, sender));
  continue;
  