Implement governed hybrid campaign delivery

src/govoplan_campaign/backend/routes/campaigns.py

@@ -65,6 +65,7 @@ from govoplan_campaign.backend.campaign.postbox_targets import (
 from govoplan_campaign.backend.integrations import (
     PostboxDeliveryUnavailable,
     postbox_integration,
+    templates_integration,
 )
 from govoplan_core.db.session import get_session
 from govoplan_core.core.distribution_lists import (
@@ -755,6 +756,29 @@ def campaign_postbox_catalog(
     )
 
 
+@router.get("/{campaign_id}/print-templates")
+def campaign_print_templates(
+    campaign_id: str,
+    query: str = Query(default="", min_length=0, max_length=200),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(require_scope("campaigns:campaign:read")),
+):
+    _get_campaign_for_principal(session, campaign_id, principal)
+    integration = templates_integration()
+    if not integration.available:
+        return {"available": False, "templates": []}
+    templates = integration.list_templates(
+        session,
+        principal,
+        query=query,
+        limit=250,
+    )
+    return {
+        "available": True,
+        "templates": [dataclasses.asdict(template) for template in templates],
+    }
+
+
 @router.post(
     "/{campaign_id}/recipient-address-sources/snapshot",
     response_model=CampaignRecipientAddressSourceSnapshotResponse,