add is_canceled method to WorkflowContext

cmem_plugin_base/dataintegration/context.py

@@ -112,6 +112,10 @@ def status(self) -> Literal['Idle', 'Waiting', 'Running', 'Canceling', 'Finished
             - Canceling: Plugin has been requested to stop.
             - Finished: Plugin has finished execution."""
 
+    def is_canceled(self) -> bool:
+        """Check if the workflow is in the 'Canceling' state."""
+        return self.status() == 'Canceling'
+
 
 class ExecutionContext:
     """Combines context objects that are available during plugin execution."""