Additional event informations can be added

app/Models/Event.php

@@ -87,6 +87,7 @@ class Event extends InstancedModel
         'vat_pricing_mode',
         'tax_exemption_reason',
         'tax_exemption_note',
+        'participation_options',
 
     ];
 
@@ -114,6 +115,8 @@ class Event extends InstancedModel
 
         'tax_liable' => 'boolean',
         'vat_rate' => 'integer',
+
+        'participation_options' => 'array',
     ];
 
     public function tenant(): BelongsTo