feat: Toggle to disallow users to send messages after a conversation is resolved (#3605)

db/migrate/20211216110209_add_allow_messages_after_resolved_to_inbox.rb

@@ -0,0 +1,16 @@
+class AddAllowMessagesAfterResolvedToInbox < ActiveRecord::Migration[6.1]
+  def change
+    add_column :inboxes, :allow_messages_after_resolved, :boolean, default: true
+
+    update_csat_enabled_inboxes
+  end
+
+  def update_csat_enabled_inboxes
+    ::Inbox.where(channel_type: 'Channel::WebWidget', csat_survey_enabled: true).find_in_batches do |inboxes_batch|
+      inboxes_batch.each do |inbox|
+        inbox.allow_messages_after_resolved = false
+        inbox.save!
+      end
+    end
+  end
+end