Add nomad-state-metrics to third-party exporters

[bhope]

nomad-state-metrics is a Prometheus exporter that exposes HashiCorp Nomad object state as metrics - covering jobs, allocations, nodes, deployments, and evaluations. It fills the observability gap between host-level metrics (node_exporter) and Nomad's built-in process metrics (/v1/metrics) by exposing workload object state as Prometheus gauges.

Inspired by kube-state-metrics.

nomad-state-metrics is also now listed on official Hashicorp Nomad community tools page: https://developer.hashicorp.com/nomad/tools

[bhope]

Hi @jan--f I reopened this with the valid link. The project is actively maintained and has already been recognized by Hashicorp Nomad and officially listed in their community page. I am also working with them to get this listed as official integration.

I would love this to be included in Prometheus exporters list, hence the PR.

[jan--f]

Hello from the bug scrub!
Thank you for your contribution. I'm afraid we need to decline this for now. We are happy to feature exporters that are actively developed and used. Unfortunately this one has so far only a limited community behind it and seemingly low adoption. Please try again at a later stage.
We are considering changing how we list community exporters, so please do check back soon.