fix school year for all tables

app/Models/CurrentFlagModel.php

@@ -4,9 +4,12 @@
 namespace App\Models;
 
 use CodeIgniter\Model;
+use App\Models\Concerns\SchoolYearAutoFillTrait;
 
 class CurrentFlagModel extends Model
 {
+    use SchoolYearAutoFillTrait;
+
     protected $table = 'current_flag';
     protected $primaryKey = 'id';
     protected $allowedFields = [
@@ -28,6 +31,10 @@ class CurrentFlagModel extends Model
         'created_at',
         'updated_at'
     ];
+    protected $validationRules = [
+        'school_year' => 'required|string|max_length[9]',
+    ];
+
 
     // Fields that are allowed to be inserted or updated