fix: use firstOrCreate instead of factory in seeder to prevent fake() undefined error in production

database/seeders/FilamentAdminSeeder.php

@@ -15,12 +15,14 @@ class FilamentAdminSeeder extends Seeder
      */
     public function run(): void
     {
-        $user = User::factory()->create([
-            'name' => 'Admin',
-            'email' => 'admin@example.com',
-            'password' => Hash::make('password'),
-            'email_verified_at' => now(),
-        ]);
+        $user = User::firstOrCreate(
+            ['email' => 'admin@example.com'],
+            [
+                'name' => 'Admin',
+                'password' => Hash::make('password'),
+                'email_verified_at' => now(),
+            ]
+        );
 
         $user->assignRole('admin');
     }