Add admin notifications for new Mastodon versions (#26582)

db/migrate/20230822081029_create_software_updates.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class CreateSoftwareUpdates < ActiveRecord::Migration[7.0]
+  def change
+    create_table :software_updates do |t|
+      t.string :version, null: false
+      t.boolean :urgent, default: false, null: false
+      t.integer :type, default: 0, null: false
+      t.string :release_notes, default: '', null: false
+
+      t.timestamps
+    end
+
+    add_index :software_updates, :version, unique: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_08_18_142253) do
+ActiveRecord::Schema[7.0].define(version: 2023_08_22_081029) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -903,6 +903,16 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_18_142253) do
     t.index ["var"], name: "index_site_uploads_on_var", unique: true
   end
 
+  create_table "software_updates", force: :cascade do |t|
+    t.string "version", null: false
+    t.boolean "urgent", default: false, null: false
+    t.integer "type", default: 0, null: false
+    t.string "release_notes", default: "", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["version"], name: "index_software_updates_on_version", unique: true
+  end
+
   create_table "status_edits", force: :cascade do |t|
     t.bigint "status_id", null: false
     t.bigint "account_id"