Add jellyfin, beszel, and watchtower stack compose files

Migrated from Portainer to Komodo for lpdelta01 server.

- jellyfin: Media server with hardware transcoding
- beszel: Monitoring agent
- watchtower: Container auto-updater

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

stacks/beszel.compose.yml

@@ -0,0 +1,12 @@
+services:
+  beszel-agent:
+    image: henrygd/beszel-agent:latest
+    container_name: Beszel-Agent
+    network_mode: host
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    environment:
+      LISTEN: 45876
+      KEY: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHcTZEemBy0qPGuNEkV15ZX6T+j87KVHYZNMY/GJK+QD
+      FILESYSTEM: /dev/sda1
+    restart: on-failure:5