Apply duration_suboptimal_units lint findings (#7144)

Quote from lint description:
"Using a smaller unit for a duration that is evenly divisible by a larger unit reduces readability. Readers have to mentally convert values, which can be error-prone and makes the code less clear."

src/util.rs

@@ -734,7 +734,7 @@ where
 
                 warn!("Can't connect to database, retrying: {e:?}");
 
-                sleep(Duration::from_millis(1_000)).await;
+                sleep(Duration::from_secs(1)).await;
             }
         }
     }