Verify demo seed user and make init FK creation idempotent

db/init/init.sql

@@ -91,8 +91,22 @@ CREATE TABLE IF NOT EXISTS `tenants` (
   CONSTRAINT `fk_tenants_status_changed_by` FOREIGN KEY (`status_changed_by`) REFERENCES `users` (`id`) ON DELETE SET NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
-ALTER TABLE `users`
-  ADD CONSTRAINT `fk_users_current_tenant` FOREIGN KEY (`current_tenant_id`) REFERENCES `tenants` (`id`) ON DELETE SET NULL;
+SET @fk_users_current_tenant_exists = (
+  SELECT COUNT(*)
+  FROM information_schema.TABLE_CONSTRAINTS
+  WHERE CONSTRAINT_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'users'
+    AND CONSTRAINT_NAME = 'fk_users_current_tenant'
+    AND CONSTRAINT_TYPE = 'FOREIGN KEY'
+);
+SET @sql_add_fk_users_current_tenant = IF(
+  @fk_users_current_tenant_exists = 0,
+  'ALTER TABLE `users` ADD CONSTRAINT `fk_users_current_tenant` FOREIGN KEY (`current_tenant_id`) REFERENCES `tenants` (`id`) ON DELETE SET NULL',
+  'SELECT 1'
+);
+PREPARE stmt_add_fk_users_current_tenant FROM @sql_add_fk_users_current_tenant;
+EXECUTE stmt_add_fk_users_current_tenant;
+DEALLOCATE PREPARE stmt_add_fk_users_current_tenant;
 
 CREATE TABLE IF NOT EXISTS `roles` (
   `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
@@ -671,6 +685,7 @@ INSERT INTO `users` (
   `last_name`,
   `display_name`,
   `email`,
+  `email_verified_at`,
   `password`,
   `locale`,
   `totp_secret`,
@@ -688,6 +703,7 @@ SELECT
   'Demo',
   'Detlef Demo',
   'demo@user.com',
+  NOW(),
   '$2y$12$KVCQvuy4Pl1aySBuzSpc7ehpZhAzYZkndDI9OaMi05E2P/Mhob5HO',
   'de',
   NULL,
@@ -700,6 +716,10 @@ SELECT
   NULL
 WHERE NOT EXISTS (SELECT 1 FROM users WHERE email = 'demo@user.com');
 
+UPDATE `users`
+SET `email_verified_at` = COALESCE(`email_verified_at`, NOW())
+WHERE `email` = 'demo@user.com';
+
 INSERT INTO `user_tenants` (`user_id`, `tenant_id`, `created`)
 SELECT u.id, t.id, NOW()
 FROM users u