Subscription tests and domain (#2209)

* Save work

* Subscriptions and trials domain

* Store family ID on customer

* Remove indirection of stripe calls

* Test simplifications

* Update brakeman

* Fix stripe tests in CI

* Update billing page to show subscription details

* Remove legacy columns

* Complete billing settings page

* Fix hardcoded plan name

* Handle subscriptions for self hosting mode

* Lint fixes

db/migrate/20250502164951_create_subscriptions.rb

@@ -0,0 +1,46 @@
+class CreateSubscriptions < ActiveRecord::Migration[7.2]
+  def change
+    create_table :subscriptions, id: :uuid do |t|
+      t.references :family, null: false, foreign_key: true, type: :uuid
+
+      t.string :status, null: false
+
+      t.string :stripe_id
+      t.decimal :amount, precision: 19, scale: 4
+      t.string :currency
+      t.string :interval
+
+      t.datetime :current_period_ends_at
+      t.datetime :trial_ends_at
+
+      t.timestamps
+    end
+
+    reversible do |dir|
+      dir.up do
+        if Rails.application.config.app_mode.managed?
+          execute <<~SQL
+            INSERT INTO subscriptions (family_id, status, trial_ends_at, created_at, updated_at)
+            SELECT
+              f.id,
+              CASE
+                WHEN f.trial_started_at IS NOT NULL THEN 'trialing'
+                ELSE COALESCE(f.stripe_subscription_status, 'incomplete')
+              END,
+              CASE
+                WHEN f.trial_started_at IS NOT NULL THEN f.trial_started_at + INTERVAL '14 days'
+                ELSE NULL
+              END,
+              now(),
+              now()
+            FROM families f
+          SQL
+        end
+      end
+    end
+
+    remove_column :families, :stripe_subscription_status, :string
+    remove_column :families, :trial_started_at, :datetime
+    remove_column :families, :stripe_plan_id, :string
+  end
+end