fix: validate pressures before computing pressure ratios in simplified train

Move validate_pressures() call before create_compressor_model() to prevent
divide-by-zero warning when suction pressure is zero. The validation error
was already raised, but after the division had already been attempted.

Author: olelod

src/libecalc/presentation/yaml/mappers/consumer_function_mapper.py

@@ -1313,6 +1313,12 @@ def _map_compressor(
             discharge_pressure=discharge_pressure,
         )
 
+        if suction_pressure is not None and discharge_pressure is not None:
+            validate_pressures(
+                suction_pressure=suction_pressure,
+                discharge_pressure=discharge_pressure,
+            )
+
         compressor_model, fluid_model = self._compressor_model_mapper.create_compressor_model(
             model.energy_function, operational_data=operational_data
         )
@@ -1321,12 +1327,6 @@ def _map_compressor(
         if consumes != consumption_type:
             raise InvalidConsumptionType(actual=consumption_type, expected=consumes)
 
-        if suction_pressure is not None and discharge_pressure is not None:
-            validate_pressures(
-                suction_pressure=suction_pressure,
-                discharge_pressure=discharge_pressure,
-            )
-
         model_id = uuid4()
         # Register the compressor model and its evaluation input in the process service
         # - If it is a sampled model, or a turbine model wrapping a sampled model, treat as non-process.