Cleanup: use instrument to log checkpoint sequence number in checkpoi…

…nt execution (MystenLabs#15154)

## Description 

To remove redundant `checkpoint_seq=?checkpoint.sequence_number()` in
all the nested debugging logging.

## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

crates/sui-core/src/checkpoints/checkpoint_executor/mod.rs

@@ -330,7 +330,7 @@ impl CheckpointExecutor {
         pending: &mut CheckpointExecutionBuffer,
         epoch_store: Arc<AuthorityPerEpochStore>,
     ) {
-        debug!(checkpoint_seq=?checkpoint.sequence_number(), "Scheduling checkpoint for execution");
+        debug!("Scheduling checkpoint for execution");
 
         // Mismatch between node epoch and checkpoint epoch after startup
         // crash recovery is invalid
@@ -516,7 +516,7 @@ impl CheckpointExecutor {
 
 // Logs within the function are annotated with the checkpoint sequence number and epoch,
 // from schedule_checkpoint().
-#[instrument(level = "debug", skip_all)]
+#[instrument(level = "debug", skip_all, fields(seq = ?checkpoint.sequence_number(), epoch = ?epoch_store.epoch()))]
 async fn execute_checkpoint(
     checkpoint: VerifiedCheckpoint,
     authority_store: Arc<AuthorityStore>,
@@ -528,7 +528,7 @@ async fn execute_checkpoint(
     metrics: &Arc<CheckpointExecutorMetrics>,
     data_ingestion_dir: Option<PathBuf>,
 ) -> SuiResult {
-    debug!(checkpoint_seq=?checkpoint.sequence_number(), "Preparing checkpoint for execution",);
+    debug!("Preparing checkpoint for execution",);
     let prepare_start = Instant::now();
 
     // this function must guarantee that all transactions in the checkpoint are executed before it
@@ -545,7 +545,7 @@ async fn execute_checkpoint(
     );
 
     let tx_count = execution_digests.len();
-    debug!(checkpoint_seq=?checkpoint.sequence_number(), "Number of transactions in the checkpoint: {:?}", tx_count);
+    debug!("Number of transactions in the checkpoint: {:?}", tx_count);
     metrics.checkpoint_transaction_count.report(tx_count as u64);
 
     execute_transactions(
@@ -983,7 +983,6 @@ async fn execute_transactions(
         .report(prepare_elapsed.as_micros() as u64);
     if checkpoint.sequence_number % CHECKPOINT_PROGRESS_LOG_COUNT_INTERVAL == 0 {
         info!(
-            checkpoint_seq=?checkpoint.sequence_number(),
             "Checkpoint preparation for execution took {:?}",
             prepare_elapsed
         );
@@ -1012,7 +1011,7 @@ async fn execute_transactions(
         .checkpoint_exec_latency_us
         .report(exec_elapsed.as_micros() as u64);
     if checkpoint.sequence_number % CHECKPOINT_PROGRESS_LOG_COUNT_INTERVAL == 0 {
-        info!(checkpoint_seq = ?checkpoint.sequence_number(), "Checkpoint execution took {:?}", exec_elapsed);
+        info!("Checkpoint execution took {:?}", exec_elapsed);
     }
 
     Ok(())