chore(pgwire): add start of execution logs for all queries (#24079) (#24090)

Co-authored-by: Noel Kwan <[email protected]>

Author: risingwave-ci

src/utils/pgwire/src/pg_protocol.rs

@@ -391,6 +391,13 @@ where
 
         // Query log.
         let fut = async move {
+            if !tracing::Span::current().is_none() {
+                tracing::info!(
+                    target: PGWIRE_QUERY_LOG,
+                    status = "started",
+                );
+            }
+
             let start = Instant::now();
             let result = fut.await;
             let elapsed = start.elapsed();