Reseed demo tenants after each SSO login.

Demo Free/Pro/Enterprise accounts wipe and reload sample data on
authorization-code SSO callbacks so every sales walkthrough starts clean.

Co-authored-by: Cursor <cursoragent@cursor.com>

config/demo_accounts.php

@@ -0,0 +1,18 @@
+<?php
+
+return [
+    'enabled' => (bool) env('DEMO_ACCOUNTS_ENABLED', false),
+    'reset_on_login' => (bool) env('DEMO_RESET_ON_LOGIN', true),
+
+    'accounts' => [
+        'demo-free@ladill.com' => 'free',
+        'demo-pro@ladill.com' => 'pro',
+        'demo-enterprise@ladill.com' => 'enterprise',
+    ],
+
+    // Org members share the enterprise owner tenant.
+    'member_emails' => [
+        'demo-enterprise-member-1@ladill.com' => 'demo-enterprise@ladill.com',
+        'demo-enterprise-member-2@ladill.com' => 'demo-enterprise@ladill.com',
+    ],
+];