fix country code

app/domain/price.py

@@ -18,6 +18,7 @@ class RequestLike(Protocol):
     entity: object
     from_city: object
     to_city: object
+    country_code: object
     weight_kg: object
     length_cm: object
     width_cm: object
@@ -29,6 +30,7 @@ class NormalizedDeliveryRequest:
     entity: str
     from_city: str
     to_city: str
+    country_code: str | None
     weight_kg: Decimal
     length_cm: Decimal
     width_cm: Decimal
@@ -58,6 +60,7 @@ def normalize_delivery_request(
         entity=str(_get_required_attr(request, "entity")),
         from_city=_normalize_text(_get_required_attr(request, "from_city")),
         to_city=_normalize_text(_get_required_attr(request, "to_city")),
+        country_code=_normalize_country_code(_get_optional_attr(request, "country_code")),
         weight_kg=_normalize_weight(
             _to_decimal(_get_required_attr(request, "weight_kg")),
             normalized_weight_scale,
@@ -167,6 +170,15 @@ def _normalize_text(value: object) -> str:
     return str(value).strip()
 
 
+def _normalize_country_code(value: object) -> str | None:
+    if value is _MISSING or value is None:
+        return None
+    normalized = str(value).strip().upper()
+    if not normalized:
+        return None
+    return normalized
+
+
 def _clamp_scale(scale: int) -> int:
     if scale < 0:
         return 0