Adds CI Platform Metrics bookkeeping worker

**app/workers/all_queues.yml:**

- Automatically updated.

**app/workers/ci_platform_metrics_update_cron_worker.rb:**

- Adds a cron worker to update the CI Platform Metrics.

**config/initializers/1_settings.rb:**

- Cron settings for the new worker.

**spec/workers/ci_platform_metrics_update_cron_worker_spec.rb:**

- Spec tests for the new cron worker.

**config/gitlab.yml.example:**

- Adds cron settings to example config.

app/workers/all_queues.yml

@@ -131,6 +131,14 @@
   :weight: 1
   :idempotent:
   :tags: []
+- :name: cronjob:ci_platform_metrics_update_cron
+  :feature_category: :continuous_integration
+  :has_external_dependencies:
+  :urgency: :low
+  :resource_boundary: :cpu
+  :weight: 1
+  :idempotent:
+  :tags: []
 - :name: cronjob:container_expiration_policy
   :feature_category: :container_registry
   :has_external_dependencies:

app/workers/ci_platform_metrics_update_cron_worker.rb

+# frozen_string_literal: true
+
+class CiPlatformMetricsUpdateCronWorker # rubocop:disable Scalability/IdempotentWorker
+  include ApplicationWorker
+
+  # This worker does not perform work scoped to a context
+  include CronjobQueue # rubocop:disable Scalability/CronWorkerContext
+
+  feature_category :continuous_integration
+  urgency :low
+  worker_resource_boundary :cpu
+
+  def perform
+    CiPlatformMetric.insert_auto_devops_platform_targets!
+  end
+end

config/gitlab.yml.example

@@ -456,6 +456,10 @@ production: &base
     schedule_migrate_external_diffs_worker:
       cron: "15 * * * *"
 
+    # Update CI Platform Metrics daily
+    ci_platform_metrics_update_cron_worker:
+      cron: "47 9 * * *"
+
   # GitLab EE only jobs. These jobs are automatically enabled for an EE
   # installation, and ignored for a CE installation.
   ee_cron_jobs:

config/initializers/1_settings.rb

@@ -511,6 +511,9 @@ Settings.cron_jobs['update_container_registry_info_worker']['job_class'] = 'Upda
 Settings.cron_jobs['postgres_dynamic_partitions_creator'] ||= Settingslogic.new({})
 Settings.cron_jobs['postgres_dynamic_partitions_creator']['cron'] ||= '21 */6 * * *'
 Settings.cron_jobs['postgres_dynamic_partitions_creator']['job_class'] ||= 'PartitionCreationWorker'
+Settings.cron_jobs['ci_platform_metrics_update_cron_worker'] ||= Settingslogic.new({})
+Settings.cron_jobs['ci_platform_metrics_update_cron_worker']['cron'] ||= '47 9 * * *'
+Settings.cron_jobs['ci_platform_metrics_update_cron_worker']['job_class'] = 'CiPlatformMetricsUpdateCronWorker'
 
 Gitlab.ee do
   Settings.cron_jobs['adjourned_group_deletion_worker'] ||= Settingslogic.new({})

spec/workers/ci_platform_metrics_update_cron_worker_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe CiPlatformMetricsUpdateCronWorker, type: :worker do
+  describe '#perform' do
+    subject { described_class.new.perform }
+
+    it 'inserts new platform metrics' do
+      expect(CiPlatformMetric).to receive(:insert_auto_devops_platform_targets!).and_call_original
+
+      subject
+    end
+  end
+end