Add Package File verification progress bar

The UI code picks up the data if it exists, so no frontend change is
needed to produce the progress bar. Thanks, Zack Cuddy!

ee/app/models/concerns/geo/verifiable_replicator.rb

@@ -100,6 +100,22 @@ module Geo
 
         model.available_replicables.verification_failed.count
       end
+
+      def verified_count
+        # When verification is disabled, this returns nil.
+        # Bonus: This causes the progress bar to be hidden.
+        return unless verification_enabled?
+
+        registry_class.synced.verification_succeeded.count
+      end
+
+      def verification_failed_count
+        # When verification is disabled, this returns nil.
+        # Bonus: This causes the progress bar to be hidden.
+        return unless verification_enabled?
+
+        registry_class.synced.verification_failed.count
+      end
     end
 
     def after_verifiable_update

ee/app/models/geo_node_status.rb

@@ -38,7 +38,9 @@ class GeoNodeStatus < ApplicationRecord
       "#{replicable_class.replicable_name_plural}_checksum_failed_count".to_sym => "Number of #{replicable_class.replicable_title_plural} failed to checksum on primary",
       "#{replicable_class.replicable_name_plural}_synced_count".to_sym => "Number of #{replicable_class.replicable_title_plural} in the registry",
       "#{replicable_class.replicable_name_plural}_failed_count".to_sym => "Number of #{replicable_class.replicable_title_plural} synced on secondary",
-      "#{replicable_class.replicable_name_plural}_registry_count".to_sym => "Number of #{replicable_class.replicable_title_plural} failed to sync on secondary"
+      "#{replicable_class.replicable_name_plural}_registry_count".to_sym => "Number of #{replicable_class.replicable_title_plural} failed to sync on secondary",
+      "#{replicable_class.replicable_name_plural}_verified_count".to_sym => "Number of #{replicable_class.replicable_title_plural} verified on the secondary",
+      "#{replicable_class.replicable_name_plural}_verification_failed_count".to_sym => "Number of #{replicable_class.replicable_title_plural} failed to verify on secondary"
     }
   end
 
@@ -578,6 +580,11 @@ class GeoNodeStatus < ApplicationRecord
     self.wikis_checksum_mismatch_count = Geo::ProjectRegistry.mismatch(:wiki).count
     self.repositories_retrying_verification_count = Geo::ProjectRegistry.retrying_verification(:repository).count
     self.wikis_retrying_verification_count = Geo::ProjectRegistry.retrying_verification(:wiki).count
+
+    ::Gitlab::Geo.verification_enabled_replicator_classes.each do |replicator|
+      public_send("#{replicator.replicable_name_plural}_verified_count=", replicator.verified_count) # rubocop:disable GitlabSecurity/PublicSend
+      public_send("#{replicator.replicable_name_plural}_verification_failed_count=", replicator.verification_failed_count) # rubocop:disable GitlabSecurity/PublicSend
+    end
   end
 
   def primary_storage_digest