observability: add k8s API/kubelet tracing, Alloy, Mimir and Loki

Wire kube-apiserver and kubelet tracing to a Jaeger collector on
docker-29, deploy Grafana Alloy in-cluster to ship logs/metrics, and
stand up Mimir + Loki on docker-30 as their backing stores.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

vms/utility-101-shadow/docker/monitoring/prometheus.yml

@@ -45,7 +45,7 @@ scrape_configs:
           - https://gitea.home.hrajfrisbee.cz/
           - https://vault.hrajfrisbee.cz/
           - https://idm.home.hrajfrisbee.cz/
-          - https://maru-hleda-byt.home.hrajfrisbee.cz/mapa_bytu.html
+          # - https://maru-hleda-byt.home.hrajfrisbee.cz/mapa_bytu.html
           # - https://nonexistent.home.hrajfrisbee.cz/
     relabel_configs:
       - source_labels: [__address__]