fix school year for all tables

app/Models/WhatsappGroupLinkModel.php

@@ -1,9 +1,12 @@
 <?php namespace App\Models;
 
 use CodeIgniter\Model;
+use App\Models\Concerns\SchoolYearAutoFillTrait;
 
 class WhatsappGroupLinkModel extends Model
 {
+    use SchoolYearAutoFillTrait;
+
     protected $table         = 'whatsapp_group_links';
     protected $primaryKey    = 'id';
     protected $returnType    = 'array';
@@ -14,6 +17,10 @@ class WhatsappGroupLinkModel extends Model
         'invite_link',
         'active',
     ];
+    protected $validationRules = [
+        'school_year' => 'required|string|max_length[9]',
+    ];
+
     protected $useTimestamps = true; // requires created_at / updated_at columns
 
     private ?bool $hasSchoolYearColumn = null;