Add support for indexable attribute on remote actors (#26485)

Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

app/helpers/context_helper.rb

@@ -20,6 +20,7 @@ module ContextHelper
     focal_point: { 'toot' => 'http://joinmastodon.org/ns#', 'focalPoint' => { '@container' => '@list', '@id' => 'toot:focalPoint' } },
     blurhash: { 'toot' => 'http://joinmastodon.org/ns#', 'blurhash' => 'toot:blurhash' },
     discoverable: { 'toot' => 'http://joinmastodon.org/ns#', 'discoverable' => 'toot:discoverable' },
+    indexable: { 'toot' => 'http://joinmastodon.org/ns#', 'indexable' => 'toot:indexable' },
     voters_count: { 'toot' => 'http://joinmastodon.org/ns#', 'votersCount' => 'toot:votersCount' },
     olm: {
       'toot' => 'http://joinmastodon.org/ns#', 'Device' => 'toot:Device', 'Ed25519Signature' => 'toot:Ed25519Signature', 'Ed25519Key' => 'toot:Ed25519Key', 'Curve25519Key' => 'toot:Curve25519Key', 'EncryptedMessage' => 'toot:EncryptedMessage', 'publicKeyBase64' => 'toot:publicKeyBase64', 'deviceId' => 'toot:deviceId',

app/models/account.rb

@@ -50,6 +50,7 @@
 #  trendable                     :boolean
 #  reviewed_at                   :datetime
 #  requested_review_at           :datetime
+#  indexable                     :boolean          default(FALSE), not null
 #
 
 class Account < ApplicationRecord

app/services/activitypub/process_account_service.rb

@@ -115,6 +115,7 @@ class ActivityPub::ProcessAccountService < BaseService
     @account.fields                  = property_values || {}
     @account.also_known_as           = as_array(@json['alsoKnownAs'] || []).map { |item| value_or_id(item) }
     @account.discoverable            = @json['discoverable'] || false
+    @account.indexable               = @json['indexable'] || false
   end
 
   def set_fetchable_key!