feat(observability): add local grafana+prom stack for metrics insights

observability/grafana/provisioning/datasources/datasource.yml

@@ -0,0 +1,41 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    orgId: 1
+    url: http://prometheus:9090
+    basicAuth: false
+    isDefault: false
+    version: 1
+    editable: false
+
+  - name: Tempo
+    type: tempo
+    access: proxy
+    orgId: 1
+    url: http://tempo:3101
+    basicAuth: false
+    isDefault: false
+    version: 1
+    editable: true
+    apiVersion: 1
+    uid: tempo
+
+  - name: Loki
+    type: loki
+    access: proxy
+    orgId: 1
+    url: http://loki:3100
+    basicAuth: false
+    isDefault: false
+    version: 1
+    editable: false
+    apiVersion: 1
+    jsonData:
+      derivedFields:
+        - datasourceUid: tempo
+          matcherRegex: '"traceId":"([A-Za-z0-9]+)"'
+          name: TraceID
+          url: $${__value.raw}