Error from `exactOptionalPropertyTypes` not reported when using object spread with a ternary and optional property acces

### 🔎 Search Terms

exactOptionalPropertyTypes
object spread
ternary

### 🕗 Version & Regression Information

- This is the behavior in every version I tried, and I reviewed the FAQ for entries about exactOptionalPropertyTypes, object spread.

### ⏯ Playground Link

https://www.typescriptlang.org/play/?exactOptionalPropertyTypes=true&ts=5.9.3&ssl=5&ssc=32&pln=1&pc=1#code/C4TwDgpgBAYg9nKBeKBvAUFKYCGAnCAO2AEkATAfgC4oBnYPAS0IHN0BfddMiAYwBt80XnEL0oBAI4BXCPQBCcMiBrw4Abi78IwKMHwsdqhJvQB6M3QAWcAO60oEAB6RewCGUd48cPFDKyeogAok44bgDyYMCMojj8AAo+kHigACrgcuj6eIa6KKjYQsTkNFKyCkogAHS4BCWe7KYWUAC2jLS0zCxePn62VkRQ0l2sdGAEOJ44hJ7ueIT4INkGOshoUNVbABQMgRQbdUSkZGUQMnLAisq1xSdQ7FA0qOwAlA-qUC3yAKoA4lwRGJdIUjg0HutypdriBNDk8utCltqrs8PtDndSkV6vdHs83h8sF9LL8AeZLBBvL4oDgwJB8A4RN4+MB+CAoIwAGZQABu8UCHSghDguhw2GSlNANN4vDktA8UE5PlaNMIUDgACMAFYs9BA8Rgk4AJnWAHJTTSHPQmGMAD7DWYQTnMDxw1b5DbI1Ho0GY07Y47kE14tAEproIA

### 💻 Code

```ts
type Foo = {
parentId?: string
}

declare const requestBody: Foo;

let target: Foo;

// shows expected error due to ExactOptionalPropertyTypes
target = { parentId: requestBody.parentId };

// missing error when using spread and ternary
target = { ...(true ? { parentId: requestBody.parentId } : {}) }; // BUG

const { parentId } = requestBody;
target = { ...(true ? { parentId: parentId } : {}) }; // BUG

// error appears correctly if value is not a property accessed from an object
const parentId2 = '' as string | undefined;
target = { ...(true ? { parentId: parentId2 } : {}) };

```

### 🙁 Actual behavior

The expected error is silenced only in the specific case that combines object spread, ternary, and accessing an optional property from an object, although the types are always recognized correctly with `| undefined`.

### 🙂 Expected behavior

All scenarios demonstrated in the code snippet are expected to show the same error.

### Additional information about the issue

_No response_

从链接的 TypeScript Playground 开始，并运行 exactOptionalPropertyTypes 重现。比较直接赋值、对象展开三元表达式、解构属性和局部变量这几种情况；当展开和三元表达式的情况报告与其他场景相同的预期错误时，该 issue 即完成。

由索引模型根据 Issue 内容生成。