Govern distribution delivery channels

tests/test_policy_module_contract.py

@@ -11,6 +11,9 @@ from govoplan_core.core.policy import (
     CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,
     CAPABILITY_POLICY_VIEW_GOVERNANCE,
 )
+from govoplan_core.core.distribution_lists import (
+    CAPABILITY_POLICY_DISTRIBUTION_CHANNELS,
+)
 from govoplan_policy.backend.manifest import manifest
 
 
@@ -44,6 +47,7 @@ class PolicyModuleContractTests(unittest.TestCase):
         self.assertEqual(
             {
                 CAPABILITY_POLICY_DEFINITION_GOVERNANCE,
+                CAPABILITY_POLICY_DISTRIBUTION_CHANNELS,
                 CAPABILITY_POLICY_FUNCTION_ASSIGNMENT_GOVERNANCE,
                 CAPABILITY_POLICY_PRIVACY_RETENTION,
                 CAPABILITY_POLICY_SCHEDULING_PARTICIPANT_PRIVACY,