Fix obsolete cache key in status cache invalidation logic (#26934)

app/models/media_attachment.rb

@@ -407,6 +407,6 @@ class MediaAttachment < ApplicationRecord
   end
 
   def reset_parent_cache
-    Rails.cache.delete("statuses/#{status_id}") if status_id.present?
+    Rails.cache.delete("v3:statuses/#{status_id}") if status_id.present?
   end
 end

app/models/poll.rb

@@ -108,7 +108,7 @@ class Poll < ApplicationRecord
   def reset_parent_cache
     return if status_id.nil?
 
-    Rails.cache.delete("statuses/#{status_id}")
+    Rails.cache.delete("v3:statuses/#{status_id}")
   end
 
   def last_fetched_before_expiration?

app/models/status_stat.rb

@@ -16,8 +16,6 @@
 class StatusStat < ApplicationRecord
   belongs_to :status, inverse_of: :status_stat
 
-  after_commit :reset_parent_cache
-
   def replies_count
     [attributes['replies_count'], 0].max
   end
@@ -29,10 +27,4 @@ class StatusStat < ApplicationRecord
   def favourites_count
     [attributes['favourites_count'], 0].max
   end
-
-  private
-
-  def reset_parent_cache
-    Rails.cache.delete("statuses/#{status_id}")
-  end
 end