TulaDB evaluation observability bundle, release 0.0.1-preview.

grafana/dashboards/compose/      dashboards for the compose cluster (install-cluster.sh)
grafana/dashboards/kubernetes/   dashboards the Helm chart provisions
grafana/provisioning/            Grafana datasource + dashboard provisioning (compose paths)
prometheus/prometheus.yml        scrape config for the compose cluster's exporters

No alerting rules ship in this release.
