public function up(): void 	{ 		Schema::create('push_devices', function (Blueprint $table): void { 			$table->uuid('id')->primary(); 			$table->uuidMorphs('user'); 			$table->uuid('device_id')->index(); 			$table->string('app_version', 20)->nullable(); 			$table->unsignedTinyInteger('device_type')->nullable(); 			$table->string('device_model', 50)->nullable(); 			$table->string('device_os', 20)->nullable(); 			$table->string('timezone', 50)->nullable(); 			$table->timestamps();  			$table->index(Model::CREATED_AT); 		}); 	}