improve approval tracing

node/core/approval-voting/src/import.rs

@@ -450,7 +450,7 @@ pub(crate) async fn handle_new_head(
 		let num_candidates = included_candidates.len();
 		let approved_bitfield = {
 			if needed_approvals == 0 {
-				tracing::debug!(
+				tracing::trace!(
 					target: LOG_TARGET,
 					block_hash = ?block_hash,
 					"Insta-approving all candidates",
@@ -468,7 +468,7 @@ pub(crate) async fn handle_new_head(
 					}
 				}
 				if result.any() {
-					tracing::debug!(
+					tracing::trace!(
 						target: LOG_TARGET,
 						block_hash = ?block_hash,
 						"Insta-approving {}/{} candidates as the number of validators is too low",

node/core/approval-voting/src/lib.rs

@@ -1063,7 +1063,7 @@ async fn handle_from_overseer(
 					Ok(block_imported_candidates) => {
 						// Schedule wakeups for all imported candidates.
 						for block_batch in block_imported_candidates {
-							tracing::debug!(
+							tracing::trace!(
 								target: LOG_TARGET,
 								block_hash = ?block_batch.block_hash,
 								num_candidates = block_batch.imported_candidates.len(),
@@ -2410,7 +2410,7 @@ async fn issue_approval(
 	)
 	.expect("Statement just signed; should pass checks; qed");
 
-	tracing::debug!(
+	tracing::trace!(
 		target: LOG_TARGET,
 		?candidate_hash,
 		?block_hash,