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/spec/factories/theatre_comments.rb

@@ -0,0 +1,8 @@
+FactoryBot.define do
+  factory :theatre_comment do
+    association :theatre
+    association :user
+    sequence (:no) { |n| n }
+    content { 'test comment' }
+  end
+end