DEV: Fix poll plugin causing error when server reloads in dev env.

plugins/poll/plugin.rb

@@ -451,6 +451,7 @@ after_initialize do
     mount ::DiscoursePoll::Engine, at: "/polls"
   end
 
+  reloadable_patch do
     Post.class_eval do
       attr_accessor :extracted_polls
 
@@ -474,6 +475,7 @@ after_initialize do
     User.class_eval do
       has_many :poll_votes, dependent: :delete_all
     end
+  end
 
   validate(:post, :validate_polls) do |force = nil|
     return unless self.raw_changed? || force