remove codeigniter

app/Models/ExamDraft.php

@@ -8,7 +8,7 @@ class ExamDraft extends BaseModel
 {
     protected $table = 'exam_drafts';
 
-    // ✅ CI: useTimestamps = true (created_at/updated_at)
+    // ✅ legacy: useTimestamps = true (created_at/updated_at)
     public $timestamps = true;
 
     protected $fillable = [
@@ -55,7 +55,7 @@ class ExamDraft extends BaseModel
     ];
 
     /**
-     * CI had updateOnlyChanged=false (force updates even if nothing changed).
+     * legacy had updateOnlyChanged=false (force updates even if nothing changed).
      * In Laravel, you can force a save by calling:
      *   $model->touch();   // updates updated_at only
      *   or