Add support for editing for published statuses (#16697)

* Add support for editing for published statuses

* Fix references to stripped-out code

* Various fixes and improvements

* Further fixes and improvements

* Fix updates being potentially sent to unauthorized recipients

* Various fixes and improvements

* Fix wrong words in test

* Fix notifying accounts that were tagged but were not in the audience

* Fix mistake

app/models/status_edit.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: status_edits
+#
+#  id                        :bigint(8)        not null, primary key
+#  status_id                 :bigint(8)        not null
+#  account_id                :bigint(8)
+#  text                      :text             default(""), not null
+#  spoiler_text              :text             default(""), not null
+#  media_attachments_changed :boolean          default(FALSE), not null
+#  created_at                :datetime         not null
+#  updated_at                :datetime         not null
+#
+
+class StatusEdit < ApplicationRecord
+  belongs_to :status
+  belongs_to :account, optional: true
+
+  default_scope { order(id: :asc) }
+
+  delegate :local?, to: :status
+end