Log settlement finality latency outliers (#16353)

## Description 

As title

## Test Plan 

CI

---
If your changes are not user-facing and do not break anything, you can
skip the following section. Otherwise, please briefly describe what has
changed under the Release Notes section.

### 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/quorum_driver/mod.rs

@@ -769,6 +769,7 @@ where
                 return;
             }
         };
+        let settlement_finality_latency = timer.elapsed().as_secs_f64();
         quorum_driver
             .metrics
             .settlement_finality_latency
@@ -777,7 +778,14 @@ where
             } else {
                 TX_TYPE_SHARED_OBJ_TX
             }])
-            .observe(timer.elapsed().as_secs_f64());
+            .observe(settlement_finality_latency);
+        if settlement_finality_latency >= 8.0 || settlement_finality_latency <= 0.1 {
+            debug!(
+                ?tx_digest,
+                "Settlement finality latency is out of expected range: {}",
+                settlement_finality_latency
+            );
+        }
 
         quorum_driver.notify(&transaction, &Ok(response), old_retry_times + 1);
     }