auth: add sessions table

app/models/session.rb

@@ -0,0 +1,3 @@
+class Session < ApplicationRecord
+  belongs_to :user
+end

app/models/user.rb

@@ -18,4 +18,5 @@ class User < ApplicationRecord
   has_secure_password
   has_many :price_reports, dependent: :nullify
   has_many :moderation_logs, foreign_key: :admin_id, dependent: :nullify
+  has_many :sessions, dependent: :destroy
 end

db/migrate/20260609155259_create_sessions.rb

@@ -0,0 +1,13 @@
+class CreateSessions < ActiveRecord::Migration[8.0]
+  def change
+    create_table :sessions do |t|
+      t.references :user, null: false, foreign_key: true
+      t.string :token
+      t.string :user_agent
+      t.string :ip_address
+
+      t.timestamps
+    end
+    add_index :sessions, :token, unique: true
+  end
+end

db/migrate/20260609155729_remove_token_from_users.rb

@@ -0,0 +1,5 @@
+class RemoveTokenFromUsers < ActiveRecord::Migration[8.0]
+  def change
+    remove_column :users, :token, :string
+  end
+end

test/fixtures/sessions.yml

@@ -0,0 +1,13 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  user: one
+  token: MyString
+  user_agent: MyString
+  ip_address: MyString
+
+two:
+  user: two
+  token: MyString
+  user_agent: MyString
+  ip_address: MyString

test/models/session_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class SessionTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end