Return domain block digests from admin domain blocks API (#29092)

app/serializers/rest/admin/domain_block_serializer.rb

@@ -1,11 +1,15 @@
 # frozen_string_literal: true
 
 class REST::Admin::DomainBlockSerializer < ActiveModel::Serializer
-  attributes :id, :domain, :created_at, :severity,
+  attributes :id, :domain, :digest, :created_at, :severity,
              :reject_media, :reject_reports,
              :private_comment, :public_comment, :obfuscate
 
   def id
     object.id.to_s
   end
+
+  def digest
+    object.domain_digest
+  end
 end

spec/requests/api/v1/admin/domain_blocks_spec.rb

@@ -49,6 +49,7 @@ RSpec.describe 'Domain Blocks' do
           {
             id: domain_block.id.to_s,
             domain: domain_block.domain,
+            digest: domain_block.domain_digest,
             created_at: domain_block.created_at.strftime('%Y-%m-%dT%H:%M:%S.%LZ'),
             severity: domain_block.severity.to_s,
             reject_media: domain_block.reject_media,
@@ -102,6 +103,7 @@ RSpec.describe 'Domain Blocks' do
         {
           id: domain_block.id.to_s,
           domain: domain_block.domain,
+          digest: domain_block.domain_digest,
           created_at: domain_block.created_at.strftime('%Y-%m-%dT%H:%M:%S.%LZ'),
           severity: domain_block.severity.to_s,
           reject_media: domain_block.reject_media,
@@ -212,6 +214,7 @@ RSpec.describe 'Domain Blocks' do
         {
           id: domain_block.id.to_s,
           domain: domain_block.domain,
+          digest: domain_block.domain_digest,
           severity: 'suspend',
         }
       )