refactor: simplify distillation data layout

designir-pipeline/tests/test_experience_library.py

@@ -107,6 +107,15 @@ def make_case(index: int) -> dict:
 
 
 class CadExperienceTest(unittest.TestCase):
+    def test_default_data_paths_use_shallow_local_layout(self):
+        pipeline_root = Path(__file__).parents[1].resolve()
+        self.assertEqual(pipeline_root / "input", MODULE.input_root())
+        self.assertEqual(pipeline_root / "runs", MODULE.runs_root())
+        self.assertEqual(
+            pipeline_root / "output" / "library.json",
+            MODULE.default_library_path(),
+        )
+
     def reviewed_proposal(self) -> dict:
         return {
             "id": "constraint.flanged_hub_adapter.shared_axis",