feat: add performance logging to action_pos_order_paid to track execution time

models/pos_order.py

@@ -25,7 +25,15 @@ class PosOrder(models.Model):
 
     def action_pos_order_paid(self):
         """Override to update the customer's membership level in the background."""
+        import time
+        start_time = time.time()
+        _logger.info("POS_PERF: Starting action_pos_order_paid for %s orders", len(self))
+        
         res = super().action_pos_order_paid()
+        
+        mid_time = time.time()
+        _logger.info("POS_PERF: Super() action_pos_order_paid took %.4f seconds", mid_time - start_time)
+        
         for order in self:
             if order.partner_id:
                 # Dispatch to background thread