Remove the internal API

* Bind sessions to identities
* Remove references to the identity token
* Move email changes to identity
* Move account menu into a turbo-frame
* Create tenants from a tenanted route

script/migrations/20251028-populate_membership_id_on_users.rb

@@ -0,0 +1,20 @@
+#!/usr/bin/env ruby
+
+require_relative "../../config/environment"
+
+ApplicationRecord.with_each_tenant do |tenant|
+  puts "🏢 #{tenant}"
+  User.find_each do |user|
+    next if user.system? || !user.active?
+
+    if user.membership.present?
+      puts "✅ User #{user.id} has a membership"
+    else
+      puts "⏩ Creating membership for user #{user.id}"
+
+      identity = Identity.find_or_create_by(email_address: user.email_address)
+      membership = identity.memberships.find_or_create_by(tenant: tenant)
+      user.update_columns(membership_id: membership.id)
+    end
+  end
+end