Add with count to Tweet entity

Author: nemoipaha

backend/app/Entity/Tweet.php

@@ -24,9 +24,12 @@ final class Tweet extends Model
 {
     protected $table = 'tweets';
 
-    // The relations to eager load on every query.
+    // Relations to eager load on every query.
     protected $with = ['author'];
 
+    // Eager load related comments count each time.
+    protected $withCount = ['comments'];
+
     protected $fillable = [
         'text',
         'image_url',