Documents the Pangolin + pangolin-kube-controller deployment: architecture,
per-file component map, the two SSO flows (dashboard login vs downstream
resource protection), the ingress-protection request flow, a step-by-step
runbook for adding a new protected ingress, troubleshooting rooted in the
DEV-457 findings, and hard "do not delete" notes on the two PVCs, the
sealed secrets, and the Traefik HelmChartConfig that Pangolin depends on.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
