Add rake task to collect admin overview metrics (#13023)

* Add rake task to collect admin overview metrics

* Print the Forem Instance domain

app/models/ahoy/event.rb

@@ -6,5 +6,7 @@ module Ahoy
 
     belongs_to :visit
     belongs_to :user, optional: true
+
+    scope :overview_link_clicks, -> { where(name: "Overview Link Clicked") }
   end
 end

lib/tasks/metrics.rake

@@ -0,0 +1,10 @@
+namespace :metrics do
+  desc "Collects metrics from Forem instances"
+  task overview: :environment do
+    puts "Admin Overview Link Tracking for #{SiteConfig.app_domain}:"
+    links_by_target = Ahoy::Event.overview_link_clicks.group("properties -> 'target'").count
+    links_by_target.each do |k, v|
+      puts "#{k.delete_prefix(URL.url)}: #{v}"
+    end
+  end
+end