feat(policy): resolve scheduling participant privacy

tests/test_policy_module_contract.py

@@ -4,6 +4,12 @@ import pathlib
 import tomllib
 import unittest
 
+from govoplan_core.core.policy import (
+    CAPABILITY_POLICY_PRIVACY_RETENTION,
+    CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
+)
+from govoplan_policy.backend.manifest import manifest
+
 
 ROOT = pathlib.Path(__file__).resolve().parents[1]
 
@@ -25,6 +31,15 @@ class PolicyModuleContractTests(unittest.TestCase):
 
         self.assertEqual([], offenders)
 
+    def test_policy_manifest_exposes_policy_capabilities(self) -> None:
+        self.assertEqual(
+            {
+                CAPABILITY_POLICY_PRIVACY_RETENTION,
+                CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
+            },
+            set(manifest.capability_factories),
+        )
+
 
 if __name__ == "__main__":
     unittest.main()