Add an optional Prometheus metrics HTTP endpoint to the listener for
monitoring deployment operations. Includes four metrics:
- homelab_deploy_deployments_total (counter with status/action/error_code)
- homelab_deploy_deployment_duration_seconds (histogram with action/success)
- homelab_deploy_deployment_in_progress (gauge)
- homelab_deploy_info (gauge with hostname/tier/role/version)
New CLI flags: --metrics-enabled, --metrics-addr (default :9972)
New NixOS options: metrics.enable, metrics.address, metrics.openFirewall
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Instead of requiring users to provide the package via overlay,
the module now receives `self` from the flake and uses the
package directly from `self.packages`.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Document the complete subject hierarchy including deploy subjects,
response subjects, and discovery subject. Add example NATS server
configuration demonstrating tiered authentication with listener,
test deployer, and admin deployer permission patterns.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Allows setting --nats-url, --nkey-file, --branch, --action, and --timeout
via HOMELAB_DEPLOY_* environment variables.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Document all three operational modes, CLI flags, MCP tools,
NixOS module options, and the message protocol.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
