Handle ValueError raised in MWLStatusManager#transition_for

Author: steventux

src/services/mwl/__init__.py

@@ -35,5 +35,5 @@ def transition_for(status: str) -> tuple[MWLStatus, MWLStatus]:
             current_status = MWLStatus(status)
             previous_status = MWLStatusManager._TRANSITIONS[current_status]
             return previous_status, current_status
-        except KeyError:
+        except (KeyError, ValueError):
             raise InvalidStatusTransitionError(f"Cannot transition to '{status}'")