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.

observability/loki/Dockerfile

@@ -0,0 +1,7 @@
+FROM grafana/loki:latest
+
+COPY loki-config.yaml /etc/loki/local-config.yaml
+
+CMD ["-config.file=/etc/loki/local-config.yaml"]
+
+EXPOSE 3100