[FIX] pos_loyalty: use float_compare to compare points

After this commit, we will be using float_compare function to compare
points. This will ensure that any floating point errors are properly
handled and that we receive correct responses from the
`validate_coupon_programs` function.

opw-3264681

closes odoo/odoo#118829

X-original-commit: 48013733a6e8b655cbc81211b1010e76102b9c2a
Signed-off-by: Heinz Robin (rhe) <rhe@odoo.com>
Signed-off-by: Pedram Bi Ria (pebr) <pebr@odoo.com>

addons/pos_loyalty/models/pos_order.py

@@ -3,6 +3,7 @@
 
 from collections import defaultdict
 from odoo import _, models
+from odoo.tools import float_compare
 import base64
 
 class PosOrder(models.Model):
@@ -28,7 +29,7 @@ class PosOrder(models.Model):
                 }
             }
         for coupon in coupons:
-            if (coupon.points + point_changes[coupon.id]) < 0:
+            if float_compare(coupon.points, -point_changes[coupon.id], 2) == -1:
                 return {
                     'successful': False,
                     'payload': {