refactor(process): narrow Compressor.propagate_stream catch to CompressorThermodynamicCalculationError

Author: olelod

src/libecalc/process/process_units/compressor.py

@@ -1,5 +1,6 @@
 from typing import Final
 
+from libecalc.domain.process.compressor.core.exceptions import CompressorThermodynamicCalculationError
 from libecalc.domain.process.compressor.core.train.utils.common import (
     RECIRCULATION_BOUNDARY_TOLERANCE,
     calculate_outlet_pressure_and_stream,
@@ -68,9 +69,9 @@ def propagate_stream(self, inlet_stream: FluidStream) -> FluidStream:
                 inlet_stream=inlet_stream,
                 fluid_service=self._fluid_service,
             )
-        except Exception as exc:
-            # Any exception from the EOS flash layer (including Java/NeqSim exceptions
-            # that are not EcalcError subclasses) means the outlet state is not computable.
+        except CompressorThermodynamicCalculationError as exc:
+            # The compressor outlet thermodynamics could not produce a usable state
+            # (invalid Campbell pressure guess, PH flash failure, or invalid PH result).
             raise OutletFluidNotAchievableError(
                 process_unit_id=self._id,
                 unachievable_operating_point=CompressorOperatingPoint(