add wav metrics to sign2 (#82)

* add wav metrics to sign2

* Update grafana/provisioning/dashboards/sign2.dashboard.py

Co-authored-by: Evan Ugarte <36345325+evanugarte@users.noreply.github.com>

* address sggested change

---------

Co-authored-by: Evan Ugarte <36345325+evanugarte@users.noreply.github.com>

Author: adarshm11

grafana/provisioning/dashboards/sign2.dashboard.py

@@ -72,4 +72,24 @@
     unit=SECONDS
 )
 
+wrapper.AddPanel(
+    title="WAV Last Sent",
+    queries=[
+        ExpressionAndLegendPair(
+            'time() - wav_last_sent{job="sce-sign2"}',
+        )
+    ],
+    unit=SECONDS
+)
+
+wrapper.AddPanel(
+    title="WAV Last Updated",
+    queries=[
+        ExpressionAndLegendPair(
+            'time() - wav_last_updated{job="sce-sign2"}',
+        )
+    ],
+    unit=SECONDS
+)
+
 dashboard = wrapper.Render()