fix(hermes): Percent values must be converted from whole-number percentages to fractions using 100; this restores the expected 10%, 100%, and fractional discount totals without changing validation or rounding behavior. (incident hermes-code-demo/14)

src/discount.py

@@ -10,4 +10,4 @@ def apply_discount(subtotal: float, percent: float) -> float:
 
     if percent < 0 or percent > 100:
         raise ValueError("percent must be between 0 and 100")
-    return round(subtotal * (1 - percent / 10), 2)
+    return round(subtotal * (1 - percent / 100), 2)