feat: add campaign copying scheduling and residual handling

src/govoplan_campaign/backend/capabilities.py

@@ -14,6 +14,7 @@ from govoplan_core.core.campaigns import (
     CampaignPolicyContext,
     CampaignPolicyContextProvider,
     CampaignRetentionProvider,
+    CampaignScheduleProvider,
 )
 from govoplan_core.core.ownership import (
     OwnershipActionDecision,
@@ -715,6 +716,37 @@ def delivery_tasks_capability(context: object) -> CampaignDeliveryTaskService:
     return CampaignDeliveryTaskService()
 
 
+class CampaignScheduleService(CampaignScheduleProvider):
+    def dispatch_due(
+        self,
+        session: object,
+        *,
+        tenant_id: str | None = None,
+        now=None,
+        limit: int = 50,
+    ) -> Mapping[str, object]:
+        from govoplan_campaign.backend.campaign.scheduling import (
+            dispatch_due_campaign_schedules,
+        )
+
+        return dispatch_due_campaign_schedules(
+            session,  # type: ignore[arg-type]
+            tenant_id=tenant_id,
+            now=now,
+            limit=limit,
+        )
+
+
+def schedules_capability(context: object) -> CampaignScheduleService:
+    from govoplan_campaign.backend.runtime import configure_runtime
+
+    configure_runtime(
+        registry=getattr(context, "registry", None),
+        settings=getattr(context, "settings", None),
+    )
+    return CampaignScheduleService()
+
+
 class CampaignRetentionService(CampaignRetentionProvider):
     def apply_retention(self, session: object, *, dry_run, now, policy_for_campaign_id):
         from govoplan_campaign.backend.retention import apply_campaign_retention