Update tests, add more invalid metrics to be ignored, add sql metrics count check

tests/sql/cron_run_jobs.sql

@@ -12,9 +12,14 @@ select current_database();
 \x on
 
 -- Check the number of process pending
+\echo 'Check the number of process pending'
 -- Should be 22
 SELECT count(*) as jobs from public.process_queue pq where pq.processed is null;
 --set role scheduler
 SELECT public.run_cron_jobs();
 -- Check any pending job
 SELECT count(*) as any_pending_jobs from public.process_queue pq where pq.processed is null;
+
+-- Check the number of metrics entries
+\echo 'Check the number of metrics entries'
+SELECT count(*) as metrics_count from api.metrics;

tests/sql/cron_run_jobs.sql.output

@@ -5,6 +5,7 @@
 
 You are now connected to database "signalk" as user "username".
 Expanded display is on.
+Check the number of process pending
 -[ RECORD 1 ]
 jobs | 26
 
@@ -14,3 +15,7 @@ run_cron_jobs |
 -[ RECORD 1 ]----+--
 any_pending_jobs | 2
 
+Check the number of metrics entries
+-[ RECORD 1 ]-+----
+metrics_count | 172
+