feat: initialize governed datasources module

tests/test_manifest.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import unittest
+
+from govoplan_core.core.datasources import (
+    CAPABILITY_DATASOURCE_CATALOGUE,
+    CAPABILITY_DATASOURCE_LIFECYCLE,
+)
+from govoplan_datasources.backend.manifest import get_manifest
+
+
+class DatasourceManifestTests(unittest.TestCase):
+    def test_manifest_exposes_provider_neutral_contracts(self) -> None:
+        manifest = get_manifest()
+
+        self.assertEqual(manifest.id, "datasources")
+        self.assertIn(CAPABILITY_DATASOURCE_CATALOGUE, manifest.capability_factories)
+        self.assertIn(CAPABILITY_DATASOURCE_LIFECYCLE, manifest.capability_factories)
+        self.assertIn(
+            "datasources.materializations",
+            {item.name for item in manifest.provides_interfaces},
+        )
+        requirement = next(
+            item
+            for item in manifest.requires_interfaces
+            if item.name == "connectors.datasource_origins"
+        )
+        self.assertTrue(requirement.optional)
+
+
+if __name__ == "__main__":
+    unittest.main()