message: Downgrade some synchronizer logs to TRACE.
diff: @@ -7,7 +7,7 @@ use std::{
  use datasize::DataSize;
  use itertools::Itertools;
  use rand::{thread_rng, RngCore};
  -use tracing::{debug, info};
  +use tracing::{debug, info, trace};
  use crate::{
  components::consensus::{
  @@ -210,16 +210,16 @@ impl<I: NodeIdT, C: Context + 'static> Synchronizer<I, C> {
  pub(crate) fn purge_vertices(&mut self, oldest: Timestamp) {
  info!("purging synchronizer queues");
  let no_deps_expired = self.vertices_no_deps.remove_expired(oldest);
  - debug!(?no_deps_expired, "expired no dependencies");
  + trace!(?no_deps_expired, "expired no dependencies");
  self.requests_sent.clear();
  let to_be_added_later_expired =
  Self::remove_expired(&mut self.vertices_to_be_added_later, oldest);
  - debug!(
  + trace!(
  ?to_be_added_later_expired,
  "expired to be added later dependencies"
  );
  let awaiting_deps_expired = Self::remove_expired(&mut self.vertices_awaiting_deps, oldest);
  - debug!(?awaiting_deps_expired, "expired awaiting dependencies");
  + trace!(?awaiting_deps_expired, "expired awaiting dependencies");
  }
  // Returns number of elements in the `vertices_to_be_added_later` queue.
  @@ -427,7 +427,7 @@ impl<I: NodeIdT, C: Context + 'static> Synchronizer<I, C> {
  }
  // Otherwise request the missing dependency from the sender.
  let uuid = thread_rng().next_u64();
  - debug!(?uuid, dependency = ?transitive_dependency, %sender, "requesting dependency");
  + trace!(?uuid, dependency = ?transitive_dependency, %sender, "requesting dependency");
  let ser_msg =
  HighwayMessage::RequestDependency(uuid, transitive_dependency).serialize();
  outcomes.push(ProtocolOutcome::CreatedTargetedMessage(ser_msg, sender));
  