Implement changes due to Article DTO changes

[Dodje]

As starting point here are some changes which were mentioned in the comment:
#16 (comment)

• Separeted DTOs
• Created Entity
• Updated mapper methods
• Removed mapping slug - from lists for cached data

And

• Small fix: replaced updatedAt with createdAt in feed's ArticleMeta

[netlify]

✅ Deploy Preview for realworld-fsd ready!

Name	Link
🔨 Latest commit	225adcc
🔍 Latest deploy log	https://app.netlify.com/sites/realworld-fsd/deploys/66e06eb0ba4f1e00088954fb
😎 Deploy Preview	https://deploy-preview-17--realworld-fsd.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[yurisldk]

@Dodje sorry for the dalay.

I made some changes with favorite/unfavorite model. You can check that out.

As you mentioned, requests do not return up-to-date data in the case of an optimistic update, but cached data, we need to make changes to ignore the cache in certain cases, after that the main tasks will be done and the next goal is review and MR

[Dodje]

I'm also sorry for delays, it just happens to coincide with vacation, but I'm trying to be online :)

we need to make changes to ignore the cache in certain cases

What would you suggest here? I'm not familiar with ReactQuery. But It seems like we are going to fix backend bug on frontend, which is not good at all..

Sadly backend is not working again, getting 500

Some update:
As I can see, there is the invalidation request queryClient.invalidateQueries({ queryKey: ArticleQueries.keys.root }) which makes our articles queries to refetch the data.

So we have onError method which changes state to previous, and on success we can do nothing actually.
Or I would actually suggest not to do anything at all and wait till backend fixes it's issues. Because when we update the page we will see false state of favorite button which is confusing confusing. But I believe it is not a frontend issue...

What do you think?