Move model observers onto attributes and tidy provider bindings.

Register observers with ObservedBy, bind the comment spam classifier, and keep AppServiceProvider focused on application wiring.

app/Models/ContentType.php

@@ -2,15 +2,16 @@
 
 namespace App\Models;
 
+use App\Observers\ContentTypeObserver;
+use Illuminate\Database\Eloquent\Attributes\ObservedBy;
+use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\HasMany;
-use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
-
-use App\Models\Artwork;
 
+#[ObservedBy([ContentTypeObserver::class])]
 class ContentType extends Model
 {
-    protected $fillable = ['name','slug','description','order','hide_from_menu','mascot_path','cover_art_path'];
+    protected $fillable = ['name', 'slug', 'description', 'order', 'hide_from_menu', 'mascot_path', 'cover_art_path'];
 
     protected $casts = [
         'order' => 'integer',
@@ -81,6 +82,6 @@ class ContentType extends Model
             return $path;
         }
 
-        return rtrim((string) config('cdn.files_url', 'https://cdn.skinbase.org'), '/') . '/' . ltrim($path, '/');
+        return rtrim((string) config('cdn.files_url', 'https://cdn.skinbase.org'), '/').'/'.ltrim($path, '/');
     }
 }