Add sanitized compose files for 21 rocky-docker stacks missing from the mirror

audiobookshelf, bazarr, beets, dashy, dockhand, docker-socket-proxy,
emby, ghost (+umami), jellyfin, kodi-mariadb, kopia, lidarr,
music-assistant, prowlarr, qbittorrent, radarr, seerr, sonarr, tdarr,
tinymediamanager, trilium — these run in the fleet today but had no
public entry at all. Same sanitization convention as the rest of the
repo (paths -> /path/to/..., secrets left as bare ${VAR} refs, no CA
trust details).

Docker/Jellyfin/docker-compose.yaml

@@ -0,0 +1,32 @@
+services:
+  jellyfin:
+    image: jellyfin/jellyfin:latest
+    container_name: jellyfin
+    environment:
+      - PUID=${PUID}
+      - PGID=${PGID}
+      - TZ=${TZ}
+    volumes:
+      - /path/to/jellyfin/config:/config
+      - /path/to/jellyfin/cache:/cache
+      - /path/to/media:/data
+      - /path/to/transcodes/jellyfin:/transcodes
+    ports:
+      - ${HTTP_PORT}:8096
+    restart: unless-stopped
+    healthcheck:
+      test:
+        [
+          "CMD-SHELL",
+          "curl -fsS http://localhost:8096/health | grep -q Healthy",
+        ]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      start_period: 60s
+    networks:
+      - media-net
+
+networks:
+  media-net:
+    external: true