Actually invalidate the URL if the database entry doesnt exist

[ryanmitchell]

No description provided.

[what-the-diff]

PR Summary

• Simplification of constructors in Invalidate.php and InvalidateModel.php
  The initialisation process of both classes now uses a more straightforward, one-line syntax, that streamlines the code and enhances readability.

• Refactoring in Manager.php
  The variable $cacher has been removed to tidy up the code. To maintain the same functionality, we're now leveraging the app(Cacher::class)->invalidateUrl($url, $domain). This change specifically invalidates a URL, helping to keep data up-to-date.

• Formatting improvement in TestCase.php
  The require statement presentation in the file was enhanced with a space after the keyword. This formatting update further refines the code readability.