M44: harden release integrity and assurance

backend/tests/test_knowledge.py

@@ -616,6 +616,35 @@ def test_ragcore_provider_falls_back_to_search_when_answers_unavailable(monkeypa
     )
 
 
+def test_ragcore_answers_circuit_skips_repeated_generation_failure(monkeypatch):
+    provider = RAGcoreKnowledgeProvider()
+    monkeypatch.setattr(provider._settings, "ragcore_space_id", "space-1")
+    monkeypatch.setattr(provider._settings, "ragcore_answers_circuit_breaker_seconds", 60.0)
+    search_response = _FakeResponse(200, _search_body())
+    monkeypatch.setattr(
+        provider,
+        "_client",
+        lambda: _FakeClient(
+            post_responses={
+                "/v1/answers": _FakeResponse(503, {}),
+                "/v1/search": search_response,
+            }
+        ),
+    )
+    assert (
+        provider.ask("What is the vehicle return procedure?", "first").evidence_state
+        == "grounded"
+    )
+
+    monkeypatch.setattr(
+        provider,
+        "_ask_via_answers",
+        lambda *_args: (_ for _ in ()).throw(AssertionError("open circuit called answers")),
+    )
+    second = provider.ask("What is the vehicle return procedure?", "second")
+    assert second.evidence_state == "grounded"
+
+
 def test_ragcore_provider_fallback_answer_is_localized(monkeypatch):
     provider = RAGcoreKnowledgeProvider()
     monkeypatch.setattr(provider._settings, "ragcore_space_id", "space-1")

backend/tests/test_observability.py

@@ -29,6 +29,8 @@ def test_metrics_expose_http_database_and_outbox_state(client):
     assert "mobilityops_http_requests_total" in response.text
     assert "mobilityops_database_ready 1.0" in response.text
     assert 'mobilityops_outbox_events{scenario="synthetic",status="failed"}' in response.text
+    assert "mobilityops_knowledge_provider_requests_total" in response.text
+    assert "mobilityops_knowledge_retrieval_score" in response.text
 
 
 def test_metrics_token_is_enforced_when_configured(client, monkeypatch):