normalize path seps

Author: wpbonelli

test/test_io_plumbing.py

@@ -460,11 +460,11 @@ class ChildComponent(Component):
             assert len(all_loads) == 2, f"Expected 2 loads (parent + child), got {len(all_loads)}"
 
             # First call should be for parent
-            assert "/test/parent.txt" in all_loads[0]["path"]
+            assert "/test/parent.txt" in all_loads[0]["path"].replace("\\", "/")
             assert all_loads[0]["format"] == MF6
 
             # Second call should be for child
-            assert "child1.txt" in all_loads[1]["path"]
+            assert "child1.txt" in all_loads[1]["path"].replace("\\", "/")
             assert all_loads[1]["format"] == MF6
 
             # IMPORTANT: Child should be loaded with cwd = parent's workspace