chore: snapshot workflow migration progress

backend/tests/domains/test_notifications_service.py

@@ -1,6 +1,10 @@
 """Tests for notification config service."""
 import pytest
+from sqlalchemy import select
+
+from app.domains.notifications.models import AuditLog
 from app.domains.notifications.service import (
+    emit_notification,
     upsert_notification_config,
     get_notification_configs,
 )
@@ -25,3 +29,25 @@ async def test_upsert_updates_existing(db, admin_user):
     cfg = next((c for c in configs if c.event_type == "order_submitted"), None)
     assert cfg is not None
     assert cfg.enabled is False
+
+
+@pytest.mark.asyncio
+async def test_emit_notification_persists_naive_utc_timestamp(db, admin_user):
+    """Notification writes must match the legacy naive Postgres timestamp columns."""
+    await emit_notification(
+        db,
+        actor_user_id=admin_user.id,
+        target_user_id=admin_user.id,
+        action="order.submitted",
+        entity_type="order",
+        entity_id="order-123",
+        details={"order_number": "SA-2026-00001"},
+    )
+
+    row = (
+        await db.execute(
+            select(AuditLog).where(AuditLog.action == "order.submitted")
+        )
+    ).scalar_one()
+
+    assert row.timestamp.tzinfo is None