fix is_new issue with enrollment fixes

app/Models/StudentYearStatusModel.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\SchoolYearAutoFillTrait;
+use CodeIgniter\Model;
+
+class StudentYearStatusModel extends Model
+{
+    use SchoolYearAutoFillTrait;
+
+    protected $table = 'student_year_status';
+    protected $primaryKey = 'id';
+    protected $returnType = 'array';
+    protected $useAutoIncrement = true;
+    protected $useTimestamps = true;
+    protected $createdField = 'created_at';
+    protected $updatedField = 'updated_at';
+    protected $allowedFields = [
+        'student_id',
+        'school_year',
+        'is_new',
+    ];
+
+    protected $validationRules = [
+        'student_id' => 'required|is_natural_no_zero',
+        'school_year' => 'required|regex_match[/^\d{4}-\d{4}$/]',
+        'is_new' => 'required|in_list[0,1]',
+    ];
+}