Add observability stack with Grafana, Prometheus, Loki, and cAdvisor

- Introduced a new Grafana dashboard for monitoring Docker containers using cAdvisor.
- Created provisioning files for Grafana dashboards and data sources.
- Added Dockerfiles and configuration files for Loki and Prometheus.
- Implemented a Docker Compose stack for the observability services.
- Configured Traefik as a reverse proxy for the services with appropriate routing.
- Added scripts for SSH tunneling to access the telemetry dashboard.
- Included secrets management for Grafana admin credentials.

.github/workflows/b&p-observability-grafana.yaml

@@ -0,0 +1,17 @@
+name: Build and Push Grafana Observability
+
+on:
+  push:
+    tags:
+      - "grafana-v*.*.*"
+
+jobs:
+  build-and-push:
+    uses: ./.github/workflows/action-build-and-push.yaml
+    permissions:
+      contents: read
+      packages: write
+    with:
+      image_name: observability/grafana
+      build_context: ./observability/grafana
+      file_path: ./observability/grafana/Dockerfile