Add Prometheus, Grafana, and Loki stack #5

Goal

Provide an opt-in monitoring profile for metrics, dashboards, and centralized logs.

Scope

• Scrape service and infrastructure metrics.
• Provision baseline dashboards and alert rules.
• Collect structured logs with bounded retention and redaction guidance.

Acceptance criteria

• The monitoring profile starts independently from the core stack.
• Dashboards show request/check throughput, errors, queue depth, and latency.
• Metrics and logs contain no credentials or raw private proxy lists.

Dependencies

• proxy-infrastructure.

Milestone target

v1.0 Production