Heading characters in the URL. How to fix?

Question

symfony

Hello.
Faced with the task: "Fix uppercase characters in the URL". Now it is quite possible to specify a URL in the site that will contain capital letters:
site.com/blog-ARTICLE-1

Because of this, duplicate pages may result, so you need to fix the problem. I looked at what Google says about this - it all boils down to .htaccess adjustments (or virtual host settings + .htaccess):

• convert-and-redirect-url-in-uppercase-to-lowercase...
  
• htaccess-redirect-url-v-nizhniy-registr
  

It boils down to the fact that if capital letters are specified, a redirect to the main one occurs. But I have a strong feeling that this is not what I need :)

After digging, I noticed that you can specify an arbitrary register only for slug, the slug is in the database and this field has collation: "utf8mb4_ci", i.e. case-insensitive and that's why, you can safely refer to two URLs:
1. site.com/blog-ARTICLE-1
2. site.com/blog-article-1

I work with Symfony (version 4.3.11) not so long ago, therefore I can't google right away. Is it possible in Doctrine to specify collate case-sensitive? What would 404 appear at the first address? Through an annotation or in any other way.

I will be very grateful for your help.