docs: document homelab services, deployment, and repository review

streaming/README.md

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+# Media stack
+
+Docker services for playback, requests, library management, and downloads.
+
+Compose runs Jellyfin, Jellyseerr, Sonarr, Radarr, Prowlarr, qBittorrent, and the
+other services declared in the file. Kubernetes only routes to host endpoints;
+update `k8s/routing/external-service.yaml` when the Docker host or ports change.
+
+Prepare the paths, user/group IDs, and credentials from `.env.example`. Service
+configuration and media/download directories are bind mounts. Preserve their
+permissions when moving data, and keep the application databases with backups.
+
+Review device mounts for hardware acceleration before starting on another host.
+Both active markers are present, so normal deploys include Compose and routing.
+
+See the [repository README](../README.md) for deployment selection.