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/synology/README.md

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+# Synology DSM — native packages
+
+Geïnstalleerd als **Synology Package** (niet Docker). Geen compose; backup via DSM of Hyper Backup.
+
+| Package | Doel | Config-locatie (typisch) |
+|---------|------|---------------------------|
+| Docker | Container engine | DSM Package Center |
+| UniFi SDN Controller | Oud/alternatief UniFi | `@apphome/UniFiSDNController` |
+| Jellyfin | Media server | `@apphome/jellyfin` |
+| Plex Media Server | Media | `@apphome/PlexMediaServer` |
+| Tailscale | VPN mesh | `@appdata/Tailscale` |
+| Surveillance Station | Camera's | `@apphome/SurveillanceStation` |
+| Synology Photos | Foto's | `@apphome/SynologyPhotos` |
+| Synology Drive | Bestanden sync | `@apphome/SynologyDrive` |
+| Hyper Backup | Backups | `@apphome/HyperBackup` |
+| Active Backup | PC backup | `@apphome/ActiveBackup` |
+| Web Station | Web hosting | `@apphome/WebStation` |
+| MariaDB | Database | `@apphome/MariaDB10` |
+| VPN Center | VPN server | `@apphome/VPNCenter` |
+| Virtualization | VMM | `@apphome/Virtualization` |
+
+> Paden onder `/volume1/@apphome/` — alleen leesbaar met root. Documenteer instellingen handmatig of via DSM export.