feat: meal post visibility

app/Models/MealPosts.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Enums\MealPostVisibility;
 use Illuminate\Database\Eloquent\Concerns\HasUlids;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -22,6 +23,11 @@ class MealPosts extends Model
         'fats',
         'title',
         'eaten_at',
+        'visibility',
+    ];
+
+    protected $attributes = [
+        'visibility' => MealPostVisibility::Private->value,
     ];
 
     public function user(): BelongsTo
@@ -33,6 +39,7 @@ class MealPosts extends Model
     {
         return [
             'eaten_at' => 'datetime',
+            'visibility' => MealPostVisibility::class,
         ];
     }
 }