public function up(): void 	{ 		Schema::create('order_discounts', function (Blueprint $table): void { 			$table->uuid('id')->primary();  			$table->uuid('order_id'); 			$table->uuid('discount_id')->nullable();  			$table->foreign('discount_id')->references('id')->on('discounts')->onDelete('set null'); 			$table->foreign('order_id')->references('id')->on('orders')->onDelete('cascade');  			$table->timestamps(); 		}); 	}