上映会にコメント機能追加（#297） (#299)

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Merge remote-tracking branch 'origin/main' into feature/297

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Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #299

backend/app/models/theatre_comment.rb

@@ -1,8 +1,8 @@
 class TheatreComment < ApplicationRecord
-  include MyDiscard
+  include Discard::Model
 
   self.primary_key = :theatre_id, :no
 
   belongs_to :theatre
+  belongs_to :user
 end
-