feat: prepare postgres sbom cutover

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a028f0-a42f-7582-89a8-ebaad7343834

tests/test_api.py

@@ -33,7 +33,11 @@ def register(
 
 def test_health_and_legacy_ingest_query_and_licence_report(tmp_path: Path) -> None:
     client = client_for(tmp_path)
-    assert client.get("/state/health").json() == {"status": "ok", "store": "connected"}
+    assert client.get("/state/health").json() == {
+        "status": "ok",
+        "store": "connected",
+        "dialect": "sqlite",
+    }
     register(client, "demo")
 
     response = client.post(