Clear up webhooks

app/Models/WebhookMessage.php

@@ -26,6 +26,7 @@ namespace FireflyIII\Models;
 use Eloquent;
 use FireflyIII\User;
 use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Collection;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
@@ -117,4 +118,15 @@ class WebhookMessage extends Model
     {
         return $this->hasMany(WebhookAttempt::class);
     }
+    /**
+     * Get the amount
+     *
+     * @return Attribute
+     */
+    protected function sent(): Attribute
+    {
+        return Attribute::make(
+            get: fn ($value) => (bool)$value,
+        );
+    }
 }