Add timers to trigger function (#1006)

Add timer to all trigger refresh functions to help point where the time is spend on update.

layers/waterway/update_important_waterway.sql

@@ -117,6 +117,8 @@ $$ LANGUAGE plpgsql;
 
 CREATE OR REPLACE FUNCTION waterway_important.refresh() RETURNS trigger AS
 $$
+DECLARE
+    t TIMESTAMP WITH TIME ZONE := clock_timestamp();
 BEGIN
     RAISE LOG 'Refresh waterway';
 
@@ -224,6 +226,7 @@ BEGIN
     -- noinspection SqlWithoutWhere
     DELETE FROM waterway_important.updates;
 
+    RAISE LOG 'Refresh waterway done in %', age(clock_timestamp(), t);
     RETURN NULL;
 END;
 $$ LANGUAGE plpgsql;