Добавлен поллер накладной

app/domain/cdek_polling.py

@@ -0,0 +1,11 @@
+"""Pure rules for CDEK order polling lifecycle."""
+
+TERMINAL_ORDER_STATUSES: frozenset[str] = frozenset(
+    {"INVALID", "DELIVERED", "NOT_DELIVERED", "CANCELLED"}
+)
+
+
+def is_terminal_order_status(code: str | None) -> bool:
+    if code is None:
+        return False
+    return code in TERMINAL_ORDER_STATUSES