feat: strengthen transactional audit delivery

tests/test_audit_delivery.py

@@ -17,6 +17,11 @@ from govoplan_core.core.events import (
     EventActorRef,
     PlatformEvent,
 )
+from govoplan_core.core.institutional import (
+    GovernedContextEnvelope,
+    InstitutionalReference,
+    TemporalRevision,
+)
 from govoplan_core.db.base import Base
 
 
@@ -109,6 +114,60 @@ class AuditOutboxTests(unittest.TestCase):
                 delivery.delivery_key,
             )
 
+    def test_outbox_preserves_institutional_context(self) -> None:
+        Session = self._database()
+        outbox = SqlAuditOutbox()
+        seen: list[PlatformEvent] = []
+        now = datetime.now(timezone.utc)
+        context = GovernedContextEnvelope(
+            tenant_id="tenant-1",
+            temporal=TemporalRevision(revision="decision:7", recorded_at=now),
+            decision_ref=InstitutionalReference(
+                kind="decision",
+                owner_module="committee",
+                object_id="decision-7",
+                tenant_id="tenant-1",
+                version="7",
+                valid_at=now,
+            ),
+            approval_refs=(
+                InstitutionalReference(
+                    kind="approval",
+                    owner_module="workflow",
+                    object_id="approval-3",
+                    tenant_id="tenant-1",
+                    version="3",
+                    valid_at=now,
+                ),
+            ),
+        )
+
+        with Session() as session:
+            outbox.enqueue(
+                session,
+                PlatformEvent(
+                    type="committee.decision.recorded",
+                    module_id="committee",
+                    institutional_context=context,
+                ),
+            )
+            outbox.dispatch_pending(
+                session,
+                consumers=(
+                    DurableEventConsumer(
+                        consumer_id="tests.institutional-context.v1",
+                        event_types=frozenset({"committee.decision.recorded"}),
+                        handler=lambda delivered, _key: seen.append(delivered),
+                    ),
+                ),
+            )
+
+        self.assertEqual("decision-7", seen[0].institutional_context.decision_ref.object_id)
+        self.assertEqual(
+            "approval-3",
+            seen[0].institutional_context.approval_refs[0].object_id,
+        )
+
     def test_outbox_retries_then_quarantines_a_failed_consumer(self) -> None:
         Session = self._database()
         outbox = SqlAuditOutbox(max_attempts=2)