M44: harden release integrity and assurance

backend/app/core/config.py

@@ -23,6 +23,7 @@ class Settings(BaseSettings):
     ragcore_api_token: str = ""
     ragcore_space_id: str = ""
     ragcore_http_timeout_seconds: float = 5.0
+    ragcore_answers_circuit_breaker_seconds: float = 60.0
     # Search fallback is only labelled grounded above this explicit retrieval threshold.
     # RAGcore's fused score is reciprocal-rank based (top ranks are ~1/61), so this
     # accepts only leading results while still rejecting absent and low-ranked evidence.

backend/app/core/observability.py

@@ -36,6 +36,16 @@ DATABASE_READY = Gauge(
     "mobilityops_database_ready",
     "Whether the canonical PostgreSQL database answered the most recent readiness probe.",
 )
+KNOWLEDGE_PROVIDER_REQUESTS = Counter(
+    "mobilityops_knowledge_provider_requests_total",
+    "RAGcore adapter requests by stage and outcome.",
+    ("stage", "outcome"),
+)
+KNOWLEDGE_RETRIEVAL_SCORE = Histogram(
+    "mobilityops_knowledge_retrieval_score",
+    "Observed RAGcore fused/rerank retrieval scores.",
+    buckets=(0.005, 0.01, 0.015, 0.016, 0.0162, 0.0164, 0.02, 0.05, 0.1, 0.5, 1.0),
+)
 
 
 class JsonFormatter(logging.Formatter):