fix: swr cache invalidation

[Flo0806]

Hi @pi0!

🔗 Linked issue

fixes: nuxt/nuxt#34189

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

When a cached api endpoint correctly returns a 404 response, the cached entry for that page is not removed or invalidated. This can result in stale content being served from cache even after the page has been unpublished. Now on such errors the cache will be correct invalidated and deleted if needed.

Testing

Added integration tests for it.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[vercel]

@Flo0806 is attempting to deploy a commit to the Nitro Team on Vercel.

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