Expose public module catalog discovery

tests/test_catalog_plan.py

@@ -30,6 +30,12 @@ class CatalogPlanItemTests(unittest.TestCase):
                     "python_package": "govoplan-calendar",
                     "python_ref": 42,
                     "webui_package": "@govoplan/calendar-webui",
+                    "artifact_integrity": {
+                        "python": {
+                            "url": "https://packages.example.test/calendar.whl",
+                            "sha256": "a" * 64,
+                        }
+                    },
                     "notes": "Catalog note",
                     "license_features": ["calendar.sync", "", 7],
                 },
@@ -59,6 +65,7 @@ class CatalogPlanItemTests(unittest.TestCase):
         self.assertIsNone(item.python_ref)
         self.assertEqual(item.webui_package, "@govoplan/calendar-webui")
         self.assertIsNone(item.webui_ref)
+        self.assertEqual(item.artifact_integrity["python"]["sha256"], "a" * 64)
         self.assertEqual(item.notes, "Catalog note\nLicense warning: Feature expires soon.")
         self.assertEqual(item.catalog["source"], "https://catalog.example.test/modules.json")
         self.assertEqual(item.catalog["channel"], "stable")