- Prometheus: add docker_sd_configs for auto-discovery via labels - Prometheus: mount Docker socket for Docker SD - Traefik: enable --metrics.prometheus with entrypoint/service labels - Traefik: add prometheus.io/scrape=true label - Observability: mount Docker socket for Prometheus container - Bump hub submodule (Traefik metrics queries + sparkline charts) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>