Fix tag trend migration failing due to duplicate rows (#33189)

db/post_migrate/20241123160722_move_tag_trends_to_table.rb

@@ -6,12 +6,8 @@ class MoveTagTrendsToTable < ActiveRecord::Migration[7.2]
   disable_ddl_transaction!
 
   def up
-    redis.zrange('trending_tags:all', 0, -1, with_scores: true).each do |(tag_id, score)|
-      TagTrend.create(
-        tag_id: tag_id,
-        score: score,
-        allowed: redis.zscore('trending_tags:allowed', tag_id).present?
-      )
+    redis.zrange('trending_tags:all', 0, -1, with_scores: true).each_slice(1_000) do |data|
+      TagTrend.upsert_all(data.map { |(tag_id, score)| { tag_id: tag_id, score: score, language: '', allowed: redis.zscore('trending_tags:allowed', tag_id).present? } }, unique_by: %w(tag_id language))
     end
 
     TagTrend.recalculate_ordered_rank