Add full homelab inventory and remaining home services.

UniFi, Joplin, Glance, Uptime Kuma, Whoogle, Synology packages docs,
Proxmox LXC inventory, Portainer stacks, and INVENTORY.md master list.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/uptime-kuma/README.md

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+# Uptime Kuma
+
+Monitoring / statuspagina. Data: `/volume1/docker/Configs/uptime-kuma`
+
+Poort: **3001** (let op: conflict met AdGuard web UI op 3001 — pas poort aan in `.env`).

apps/uptime-kuma/docker-compose.yml

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+services:
+  uptime-kuma:
+    image: louislam/uptime-kuma:1
+    container_name: uptime-kuma
+    restart: unless-stopped
+    ports:
+      - "${UPTIME_KUMA_PORT:-3001}:3001"
+    volumes:
+      - ${UPTIME_KUMA_DATA:-/volume1/docker/Configs/uptime-kuma}:/app/data
+    environment:
+      TZ: ${TZ:-Europe/Brussels}