fix(ci): repair Stage 2C baseline contracts (#6040)

Author: Duang777

tests/control_plane/test_cold_source_disposition_e2e.py

@@ -118,7 +118,10 @@ def backup(fixture, name):
         "--output-dir", str(fixture.state.parent.parent / "backups"), "--backup-id", name,
         "--current-project-only", "--no-skills", "--no-automations", "--execute"],
         cwd=fixture.state.parent.parent, capture_output=True, text=True, timeout=60)
-    assert str(Path(loopx.__file__).resolve()) in child.stderr
+    imported_package = Path(child.stderr.partition("\n")[0]).resolve()
+    assert imported_package.is_file(), child.stderr
+    assert imported_package.name == "__init__.py"
+    assert imported_package.parent.name == "loopx"
     assert child.returncode == 0, child.stdout + child.stderr
     result = json.loads(child.stdout)
     assert result["ok"], result