update controllers logic

app/Models/PayPalPayment.php

@@ -12,7 +12,7 @@ class PayPalPayment extends BaseModel
      * CI: created_at is managed, updated_at is NOT used.
      * In Laravel: enable timestamps but disable UPDATED_AT.
      */
-    public $timestamps = false;
+    public $timestamps = true;
     const UPDATED_AT = null;
 
     protected $fillable = [
@@ -31,8 +31,9 @@ class PayPalPayment extends BaseModel
         'summary',
         'raw_payload',
         'synced',
+        'semester',
+        'school_year',
         'sync_attempts',
-        'created_at',
     ];
 
     protected $casts = [