initial implementatin of new job queue with skip info per job

lib/App/Netdisco/DB/ResultSet/Admin.pm

@@ -46,6 +46,8 @@ will add the following additional synthesized columns to the result set:
 
 =item finished_stamp
 
+=item duration
+
 =back
 
 =cut
@@ -61,6 +63,7 @@ sub with_times {
           entered_stamp => \"to_char(entered, 'YYYY-MM-DD HH24:MI')",
           started_stamp => \"to_char(started, 'YYYY-MM-DD HH24:MI')",
           finished_stamp => \"to_char(finished, 'YYYY-MM-DD HH24:MI')",
+          duration => \"replace(age(finished, started)::text, 'mon', 'month')",
         },
       });
 }