fix: instead of converting to str, serializable values

src/cal_tools/calcat_interface.py

@@ -119,10 +119,24 @@ class CalCatApi(metaclass=ClientWrapper):
         Returns:
             (dict) Operating condition for use in CalCat API.
         """
+        import numpy as np
+
+        def make_serializable(value):
+            if isinstance(value, (np.float32, np.float64)):
+                return float(value)
+            elif isinstance(value, np.integer):
+                return int(value)
+            elif isinstance(value, (np.ndarray,)):
+                return value.tolist()
+            elif isinstance(value, (np.bool_, bool)):
+                return int(value)
+            return value
+
+        for k, v in condition.items():
 
         return {
             "parameters_conditions_attributes": [
-                {"parameter_name": k, "value": str(v)}
+                {"parameter_name": k, "value": make_serializable(v)}
                 for k, v in condition.items()
             ]
         }