Separate remote thumbnails into cache/ directory (#36911)

app/models/media_attachment.rb

@@ -5,28 +5,29 @@
 # Table name: media_attachments
 #
 #  id                               :bigint(8)        not null, primary key
-#  status_id                   :bigint(8)
+#  blurhash                         :string
-#  file_file_name              :string
+#  description                      :text
 #  file_content_type                :string
+#  file_file_name                   :string
 #  file_file_size                   :integer
+#  file_meta                        :json
+#  file_storage_schema_version      :integer
 #  file_updated_at                  :datetime
+#  processing                       :integer
 #  remote_url                       :string           default(""), not null
+#  shortcode                        :string
+#  thumbnail_content_type           :string
+#  thumbnail_file_name              :string
+#  thumbnail_file_size              :integer
+#  thumbnail_remote_url             :string
+#  thumbnail_storage_schema_version :integer
+#  thumbnail_updated_at             :datetime
+#  type                             :integer          default("image"), not null
 #  created_at                       :datetime         not null
 #  updated_at                       :datetime         not null
-#  shortcode                   :string
-#  type                        :integer          default("image"), not null
-#  file_meta                   :json
 #  account_id                       :bigint(8)
-#  description                 :text
 #  scheduled_status_id              :bigint(8)
-#  blurhash                    :string
+#  status_id                        :bigint(8)
-#  processing                  :integer
-#  file_storage_schema_version :integer
-#  thumbnail_file_name         :string
-#  thumbnail_content_type      :string
-#  thumbnail_file_size         :integer
-#  thumbnail_updated_at        :datetime
-#  thumbnail_remote_url        :string
 #
 
 class MediaAttachment < ApplicationRecord

db/migrate/20251117023614_add_thumbnail_storage_schema_version.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddThumbnailStorageSchemaVersion < ActiveRecord::Migration[8.0]
+  def change
+    add_column :media_attachments, :thumbnail_storage_schema_version, :integer
+  end
+end

db/schema.rb

@@ -727,6 +727,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_11_19_093332) do
     t.integer "thumbnail_file_size"
     t.datetime "thumbnail_updated_at", precision: nil
     t.string "thumbnail_remote_url"
+    t.integer "thumbnail_storage_schema_version"
     t.index ["account_id", "status_id"], name: "index_media_attachments_on_account_id_and_status_id", order: { status_id: :desc }
     t.index ["scheduled_status_id"], name: "index_media_attachments_on_scheduled_status_id", where: "(scheduled_status_id IS NOT NULL)"
     t.index ["shortcode"], name: "index_media_attachments_on_shortcode", unique: true, opclass: :text_pattern_ops, where: "(shortcode IS NOT NULL)"