chore: remove DaxCompanySeeder (legacy demo data)

The DaxCompanySeeder created fake DAX-40 companies and transactions
for development. We now use real data from the backend via the
TransformDataPoolToProduction job, so this seeder is no longer needed.

database/seeders/DatabaseSeeder.php

@@ -20,6 +20,7 @@ class DatabaseSeeder extends Seeder
             'email' => 'test@example.com',
         ]);
 
-        $this->call(DaxCompanySeeder::class);
+        // Note: Company and Transaction data is now synced from the backend
+        // via TransformDataPoolToProduction job, not seeded manually
     }
 }