chore: Some decodable updates for V9

[github-actions]

Note

The pull request "chore: Some decodable updates for V9" was created by @noahsmartin but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

Splitting this out as a separate change from #6348 to make the PRs smaller

#skip-changelog

[linear]

COCOA-770