fix: restore files unintentionally reverted by sync commit

- restore jgpc/ layout (undo accidental revert to thinkstation/), homelab-overview.md
  (June 13 version), docs/jarvis doc, owncloud scripts, siklos/beszel compose
- re-remove jellyfin/node-exporter and siklos/monitoring (replaced by Beszel)
- jgpc/frigate/docker-compose.yml: update to newer local version (cpuset pinning, 8G limit)
- root frigate-* files are local working copies -> gitignored

jgpc/open-webui/docker-compose.yml

@@ -0,0 +1,25 @@
+services:
+  open-webui:
+    image: ghcr.io/open-webui/open-webui:main
+    container_name: open-webui
+    network_mode: host
+    restart: always
+    volumes:
+      - open-webui:/app/backend/data
+    environment:
+      - OLLAMA_BASE_URL=http://127.0.0.1:11434
+      - PORT=8080
+      - SCARF_NO_ANALYTICS=true
+      - DO_NOT_TRACK=true
+      - ANONYMIZED_TELEMETRY=false
+      - WHISPER_MODEL=base
+      - DOCKER=true
+    healthcheck:
+      test: ["CMD-SHELL", "curl --silent --fail http://localhost:8080/health || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+volumes:
+  open-webui:
+    external: true