fix: regression caused by #5440

[stipsan]

Description

In #5440, released in v3.24.1, the debug URL secrets feature broke.
When using sanity/presentation it's possible to view generated URL secrets.

On versions 3.23.4 and older it works fine:

Updating to v3.24.1, or all the way up to v3.27.1, then the list is empty:

What to review

The regression fix shouldn't cause further regressions. For example it's not desirable that url preview secrets shows up in the global search. We just want a way for it to show up when the debug plugin is added to the config:

import { defineConfig } from 'sanity'
import { debugSecrets } from '@sanity/preview-url-secret/sanity-plugin-debug-secrets'

export default defineConfig({
  // ... other options
  plugins: [
    // Makes the url secrets visible in the Sanity Studio like any other documents defined in your schema
    debugSecrets(),
  ],
})

The plugin loads this schema.

Testing

Create a document of the sanity.previewUrlSecret type, and after loading the plugin as outlined above the document should show up in the Structure document list.

Notes for release

fix: regression that broke @sanity/preview-url-secret/sanity-plugin-debug-secrets in v3.24.1

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Name	Status	Preview	Comments	Updated (UTC)
performance-studio	❌ Failed (Inspect)			Feb 2, 2024 4:02pm
test-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 2, 2024 4:02pm

1 Ignored Deployment

Name	Status	Preview	Comments	Updated (UTC)
studio-workshop	⬜️ Ignored (Inspect)	Visit Preview		Feb 2, 2024 4:02pm

[github-actions]

No changes to documentation

[github-actions]

Component Testing Report Updated Feb 2, 2024 4:06 PM (UTC)

File	Status	Duration	Passed	Skipped	Failed
comments/CommentInput.spec.tsx	✅ Passed (Inspect)	32s	15	0	0
formBuilder/ArrayInput.spec.tsx	✅ Passed (Inspect)	6s	3	0	0
formBuilder/inputs/PortableText/Annotations.spec.tsx	✅ Passed (Inspect)	12s	3	0	0
formBuilder/inputs/PortableText/copyPaste/CopyPaste.spec.tsx	✅ Passed (Inspect)	13s	4	2	0
formBuilder/inputs/PortableText/Decorators.spec.tsx	✅ Passed (Inspect)	13s	6	0	0
formBuilder/inputs/PortableText/FocusTracking.spec.tsx	✅ Passed (Inspect)	33s	15	0	0
formBuilder/inputs/PortableText/Input.spec.tsx	✅ Passed (Inspect)	19s	9	0	0
formBuilder/inputs/PortableText/ObjectBlock.spec.tsx	✅ Passed (Inspect)	1m 1s	18	0	0
formBuilder/inputs/PortableText/Styles.spec.tsx	✅ Passed (Inspect)	14s	6	0	0
formBuilder/inputs/PortableText/Toolbar.spec.tsx	✅ Passed (Inspect)	19s	9	0	0