feat: Platform API improvements (#2900)

- Platform APIs to add and update custom attributes to users
- Platform APIs to delete accounts
- Platform APIs to delete users

app/jobs/delete_object_job.rb

@@ -0,0 +1,7 @@
+class DeleteObjectJob < ApplicationJob
+  queue_as :default
+
+  def perform(object)
+    object.destroy!
+  end
+end