Content Loader API deleting slug field

[datner]

Astro Info

Astro                    v5.0.0-beta.4
Node                     v20.14.0
System                   macOS (arm64)
Package Manager          unknown (<- using pnpm, not sure why it's not recognized)
Output                   static
Adapter                  @astrojs/node (<- thats not correct 🤨, wut)
Integrations             @astrojs/react
                         @astrojs/tailwind
                         @astrojs/partytown

If this issue only occurs in one browser, which browser is a problem?

N/A

Describe the Bug

in a loader, when some datum includes a field named slug, it will be deleted

{
  load: async ({ parseData, .. }) => {
    const data = await parseData({
      id: '...',
      data: { .., slug: "foo" }
    }) // BOOM! expected `slug`, but was missing!
  }
}

What's the expected result?

to not have my data removed >:(
in a loader, when some datum includes a field named slug, it will be deleted

{
  load: async ({ parseData, .. }) => {
    const data = await parseData({
      id: '...',
      data: { .., slug: "foo" }
    }) // 👍👍👍 very good, I too have love for Gastropoda
  }
}

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-ug9hbd?file=src%2Fcontent%2Fconfig.ts

Participation

• I am willing to submit a pull request for this issue.