Fix 61 Prometheus targets DOWN: cAdvisor, Traefik, Grafana scrape configs

Commit `01d3c01`

Replace broken docker-containers job (54 DOWN) with cadvisor DNS SD targeting tasks.base_cadvisor:8080 instead of non-existent node:8088
Fix Grafana prometheus.port label: remove quotes around “3000” that broke relabel regex matching (3 DOWN)
Fix suricata job: switch from static config to DNS SD for proper multi-instance discovery
Clean up docker-swarm-services relabel: remove redundant drop rule after keep, normalize whitespace

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com