add user_id attribut on Notifications table

app/Models/Notification.php

@@ -8,6 +8,7 @@ class Notification extends Model
 {
     protected $fillable = [
         'content',
+        'user_id',
     ];
 
     public function users(): \Illuminate\Database\Eloquent\Relations\BelongsToMany

database/migrations/2025_11_07_103448_create_notifications_table.php

@@ -15,6 +15,7 @@ return new class extends Migration
             $table->id();
             $table->timestamps();
             $table->string('content');
+            $table->integer('user_id')->default(null);
         });
     }