Fix macro type and update radarsimcpp submodule

Corrects the macro value for _FREETIER_ to be a string and updates the type annotation for macros in setup.py. Also updates the radarsimcpp submodule to the latest commit.

Author: rookiepeng

setup.py

@@ -178,10 +178,12 @@ def _configure_macros(self) -> None:
         Sets up macros for compilation including NumPy compatibility,
         free tier, and CUDA support based on configuration.
         """
-        self.macros = [("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")]
+        self.macros: List[tuple[str, Optional[str]]] = [
+            ("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")
+        ]
 
         if self.is_free:
-            self.macros.append(("_FREETIER_", 1))
+            self.macros.append(("_FREETIER_", "1"))
 
         if self.is_gpu:
             self.macros.append(("_CUDA_", None))