public function up(): void 	{ 		Schema::create('user_activities', function (Blueprint $table): void { 			$table->uuid('id')->primary(); 			$table->uuid('user_id'); 			$table->uuidMorphs('item'); 			$table->nullableUuidMorphs('model'); 			$table->string('ip_address', 45)->nullable(); 			$table->unsignedTinyInteger('type')->default(0); 			$table->json('updated_fields')->nullable(); 			$table->timestamps();  			$table->index(Model::CREATED_AT);  			$table->foreign('user_id')->references('id')->on('users')->cascadeOnDelete(); 		}); 	}