Rename column

`remote_items` was nice and short but could be misunderstood as
"how many items are accounts from other servers". This should
make it clear that this is the number of items for remote
collections that could in theory exceed Mastodon's limit.

app/models/collection.rb

@@ -4,18 +4,18 @@
 #
 # Table name: collections
 #
-#  id           :bigint(8)        not null, primary key
-#  description  :text             not null
-#  discoverable :boolean          not null
-#  local        :boolean          not null
-#  name         :string           not null
-#  remote_items :integer
-#  sensitive    :boolean          not null
-#  uri          :string
-#  created_at   :datetime         not null
-#  updated_at   :datetime         not null
-#  account_id   :bigint(8)        not null
-#  tag_id       :bigint(8)
+#  id                       :bigint(8)        not null, primary key
+#  description              :text             not null
+#  discoverable             :boolean          not null
+#  local                    :boolean          not null
+#  name                     :string           not null
+#  original_number_of_items :integer
+#  sensitive                :boolean          not null
+#  uri                      :string
+#  created_at               :datetime         not null
+#  updated_at               :datetime         not null
+#  account_id               :bigint(8)        not null
+#  tag_id                   :bigint(8)
 #
 class Collection < ApplicationRecord
   MAX_ITEMS = 25
@@ -28,9 +28,10 @@ class Collection < ApplicationRecord
   validates :name, presence: true
   validates :description, presence: true
   validates :uri, presence: true, if: :remote?
-  validates :remote_items, presence: true,
-                           numericality: { greater_than_or_equal: 0 },
-                           if: :remote?
+  validates :original_number_of_items,
+            presence: true,
+            numericality: { greater_than_or_equal: 0 },
+            if: :remote?
   validate :tag_is_usable
   validate :items_do_not_exceed_limit
 

db/migrate/20251118115657_create_collections.rb

@@ -11,7 +11,7 @@ class CreateCollections < ActiveRecord::Migration[8.0]
       t.boolean :sensitive, null: false # rubocop:disable Rails/ThreeStateBooleanColumn
       t.boolean :discoverable, null: false # rubocop:disable Rails/ThreeStateBooleanColumn
       t.references :tag, foreign_key: true
-      t.integer :remote_items
+      t.integer :original_number_of_items
 
       t.timestamps
     end

db/schema.rb

@@ -377,7 +377,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_11_19_093332) do
     t.boolean "sensitive", null: false
     t.boolean "discoverable", null: false
     t.bigint "tag_id"
-    t.integer "remote_items"
+    t.integer "original_number_of_items"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.index ["account_id"], name: "index_collections_on_account_id"

spec/models/collection_spec.rb

@@ -15,7 +15,7 @@ RSpec.describe Collection do
 
       it { is_expected.to validate_presence_of(:uri) }
 
-      it { is_expected.to validate_presence_of(:remote_items) }
+      it { is_expected.to validate_presence_of(:original_number_of_items) }
     end
 
     context 'when using a hashtag as category' do