Optional properties in @atproto/api are missing `| undefined` for use with `exactOptionalPropertyTypes`

[WesSouza]

Describe the bug

When enabling TypeScript's exactOptionalPropertyTypes, optional types marked with ? must also accept undefined as a value.

No @atproto optional allow this.

To Reproduce

https://codesandbox.io/p/sandbox/xlcg3k?file=%2Fsrc%2Findex.ts%3A10%2C16

Expected behavior

Optional properties should be expressed as:

type Example = {
  optional?: string | undefined
}

Details

• Operating system: N/A
• Node version: 22
• TypeScript version: 5.7.2