Add support for multiple keypairs for remote accounts (#38279)

db/migrate/20260323105645_create_keypairs.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class CreateKeypairs < ActiveRecord::Migration[8.0]
+  def change
+    create_table :keypairs do |t|
+      t.references :account, null: false, foreign_key: { on_delete: :cascade }
+
+      t.string :uri, null: false
+      t.integer :type, null: false
+      t.string :public_key, null: false
+      t.string :private_key
+      t.datetime :expires_at
+      t.boolean :revoked, default: false, null: false
+
+      t.timestamps
+    end
+
+    add_index :keypairs, :uri, unique: true
+  end
+end