feat: route bounded hierarchy postbox copies

src/govoplan_postbox/backend/router.py

@@ -39,6 +39,8 @@ from govoplan_postbox.backend.schemas import (
     PostboxMessageListResponse,
     PostboxMessageStateRequest,
     PostboxOrganizationTargetsResponse,
+    PostboxRouteDryRunRequest,
+    PostboxRouteDryRunResponse,
     PostboxTemplateCreateRequest,
     PostboxTemplateItem,
     PostboxTemplateListResponse,
@@ -395,6 +397,30 @@ def api_deliver_to_postbox(
     return PostboxDeliveryResponse.model_validate(asdict(result))
 
 
+@router.post(
+    "/routing/dry-run",
+    response_model=PostboxRouteDryRunResponse,
+)
+def api_preview_postbox_routing(
+    payload: PostboxRouteDryRunRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> PostboxRouteDryRunResponse:
+    _require_any(principal, DELIVERY_SCOPE, TEMPLATE_ADMIN_SCOPE)
+    try:
+        result = get_service().preview_hierarchy_routes(
+            session,
+            tenant_id=principal.tenant_id,
+            target=PostboxTargetRef(**payload.target.model_dump()),
+            producer_module=payload.producer_module,
+            classification=payload.classification,
+            expires_at=payload.expires_at,
+        )
+    except PostboxError as exc:
+        raise _http_error(exc) from exc
+    return PostboxRouteDryRunResponse.model_validate(result)
+
+
 @router.get("/groupings", response_model=PostboxGroupingListResponse)
 def api_list_postbox_groupings(
     session: Session = Depends(get_session),
@@ -502,7 +528,12 @@ def api_postbox_organization_targets(
     return PostboxOrganizationTargetsResponse(
         units=list(
             get_service().organization_targets(tenant_id=principal.tenant_id)
-        )
+        ),
+        structures=list(
+            get_service().organization_hierarchy_targets(
+                tenant_id=principal.tenant_id
+            )
+        ),
     )