Always give local quote of remote posts a quote request URI (#35383)

app/models/quote.rb

@@ -31,7 +31,7 @@ class Quote < ApplicationRecord
   belongs_to :quoted_account, class_name: 'Account', optional: true
 
   before_validation :set_accounts
-
+  before_validation :set_activity_uri, only: :create, if: -> { account.local? && quoted_account&.remote? }
   validates :activity_uri, presence: true, if: -> { account.local? && quoted_account&.remote? }
   validate :validate_visibility
 
@@ -69,4 +69,8 @@ class Quote < ApplicationRecord
 
     errors.add(:quoted_status_id, :visibility_mismatch)
   end
+
+  def set_activity_uri
+    self.activity_uri = [ActivityPub::TagManager.instance.uri_for(account), '/quote_requests/', SecureRandom.uuid].join
+  end
 end

app/serializers/activitypub/quote_request_serializer.rb

@@ -7,7 +7,7 @@ class ActivityPub::QuoteRequestSerializer < ActivityPub::Serializer
   attribute :virtual_object, key: :object
 
   def id
-    object.activity_uri || [ActivityPub::TagManager.instance.uri_for(object.target_account), '#quote_requests/', object.id].join
+    object.activity_uri
   end
 
   def type