Fatal error: Uncaught Error: Class "Illuminate\Database\Migrations\Migration" not found in /usr/www/unityweb/public/hms/database/migrations/2026_08_12_140000_create_operational_heartbeats_table.php:7 Stack trace: #0 {main} thrown in /usr/www/unityweb/public/hms/database/migrations/2026_08_12_140000_create_operational_heartbeats_table.php on line 7