[错误][放松] BundleModelParams 输出（具有符号形状字段的元组参数）在 VMShapeLower 中发生内存泄漏

Expected behavior: A Relax module that the compiler cannot build should be rejected with a clean diagnostic. In particular, relax.transform.BundleModelParams followed by relax.build (default pipeline) — or by relax.transform.VMShapeLower alone — must not crash the compiler process.