feat: 関聯タグ（#92） (#197)

Merge branch 'main' into #92

Merge remote-tracking branch 'origin/main' into #92

#92

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #197

backend/app/models/tag_similarity.rb

@@ -0,0 +1,4 @@
+class TagSimilarity < ApplicationRecord
+  belongs_to :tag, class_name: 'Tag', foreign_key: 'tag_id'
+  belongs_to :target_tag, class_name: 'Tag', foreign_key: 'target_tag_id'
+end