Inject and allow for the translation of the modules various strings

Injected a StringTranslationTrait service to the SiteGuardianService and made some strings translatable.
I haven't touched the logger messages because usually the Drupal community doesn't translate errors/warnings/notices.
Please review the patch.

Patch looks good to me, will try to give it a more in depth look asap. Thank you

Injected a TranslationInterface to SiteGuardianService
Please review patch #8

Seeing problems now when I try to access the endpoints at:
/admin/config/development/site_guardian/endpoints

Path: /site_guardian/enabled_modules_and_updates?site_guardian_key=pPRsS080_LgN6Z3x1jt5Gu-AogzHUo80hylFW1Z9nXEVG926tnuLEoxEPBf22y1hYh4JicwGEA. Drupal\Core\Http\Exception\CacheableAccessDeniedHttpException: in Drupal\Core\Routing\AccessAwareRouter->checkAccess() (line 118 of /var/www/html/docroot/core/lib/Drupal/Core/Routing/AccessAwareRouter.php).

I suspect it has something to do with the fact that the accessCheck in the service SiteGuardianService.php is using the 'Checks passed' string which is now being translated in the checkActivationAndSiteGuardianKey method.

I wonder if instead of doing:
return $this->t('Checks passed');
it might be better to just do:
return TRUE then check for the TRUE instead of a String.

I am not wanting to hold up this ticket, but I was wondering if the code could be improved here as well.

    $saved_key = $this->settings->get('site_guardian_key');
    if ($saved_key && (empty($site_guardian_key) || $site_guardian_key != $saved_key)) {
      \Drupal::logger('site_guardian')->warning("Site Guardian request received with an incorrect key, access was denied.");
      return FALSE;
    }

It could become

    $saved_key = $this->getKey(');
    if (!empty($saved_key) || !empty($site_guardian_key) || ($site_guardian_key != $saved_key)) {
      \Drupal::logger('site_guardian')->warning("Site Guardian request received with an incorrect key, access was denied.");
      return FALSE;
    }

http://simplytest.me/project/site_guardian/1.0.x?patch[]=https://git.dru...

MR#1 works fine on Drupal 9.5.8 and Drupal 10.0.8. Checked with simplytest.me. Marking as RTBC. Thanks!

Also checked with simplytest.me, code looks good too, thanks both.

Automatically closed - issue fixed for 2 weeks with no activity.