Debug cache metrics

Author: GitHub Copilot

etc/grafana/provisioning/dashboards/fingr-dashboard.json

@@ -391,7 +391,7 @@
             "type": "prometheus",
             "uid": "prometheus"
           },
-          "expr": "sum by(status) (rate(fingr_weather_data_freshness_total[5m]))",
+          "expr": "sum by(status) (rate(fingr_weather_data_freshness_total[5m])) / sum(rate(fingr_weather_data_freshness_total[5m])) * 100",
           "legendFormat": "{{status}}",
           "refId": "A"
         }

fingr/weather.py

@@ -34,9 +34,10 @@ def fetch_weather(
             api_requests_total.labels(status="success").inc()
 
         # Track weather data freshness
-        if updated:
+        logger.debug("Weather data status", status=updated)
+        if updated == "Data-Modified":
             weather_data_freshness.labels(status="updated").inc()
-        else:
+        elif updated in ("Data-Not-Expired", "Data-Not-Modified"):
             weather_data_freshness.labels(status="cached").inc()
 
         return forecast, updated