VIP-Go: change cron interval min value interval

VIP's cron setup

https://wpvip.com/blog/wordpress-cron/
https://docs.wpvip.com/wordpress-on-vip/cron-control/

Can handle frequent heavy cron schedules. Increase job frequency does not equate to slower site performance as the jobs are run async on dedicated batch containers, not front end requests.

Author: GaryJones

WordPress-VIP-Go/ruleset-test.inc

@@ -577,3 +577,13 @@ $_SERVER["REMOTE_ADDR"]; // Error.
 
 // WordPress.CodeAnalysis.AssignmentInTernaryCondition
 $var = ($a = 123) ? $a : 0; // Warning.
+
+// WordPress.WP.CronInterval
+function my_add_weekly( $schedules ) {
+	$schedules['every_30_seconds'] = array(
+		'interval' => 30,
+		'display' => __( 'Once every 30 seconds' )
+	);
+	return $schedules;
+}
+add_filter( 'cron_schedules', 'my_add_weekly'); // Warning.

WordPress-VIP-Go/ruleset-test.php

@@ -232,6 +232,7 @@
 		550 => 1,
 		556 => 1,
 		579 => 1,
+		589 => 1,
 	],
 	'messages' => [
 		7   => [

WordPress-VIP-Go/ruleset.xml

@@ -232,6 +232,12 @@
 	<rule ref="WordPressVIPMinimum.Performance.WPQueryParams.PostNotIn">
 		<severity>3</severity>
 	</rule>
+	<rule ref="WordPress.WP.CronInterval">
+		<!-- cron runs async on VIP's batch containers, so high frequency schedules will not negatively impact performance. Cron runner polling interval is 60s, so make that the min -->
+		<properties>
+			<property name="min_interval" value="60"/>
+		</properties>
+	</rule>
 
 	<!-- Silence is golden, these don't affect us on VIP Go -->
 	<rule ref="VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable">
@@ -254,4 +260,5 @@
 	<rule ref="WordPress.Security.EscapeOutput.ExceptionNotEscaped">
 		<severity>0</severity>
 	</rule>
+
 </ruleset>