docs: IRS letter, Caddyfile audit, home lab state (July 21)

- IRS name change letter for IT Pro Partner LLC
- app2 Caddyfile audit: UNMS/Gitea fixes after Technitium deploy
- Home lab state: QNAP NFS, VM migrations, vm-host-02 cleared
- homelab SSH key deployed to all hosts

docs/home-lab-state-2026-07-21.md

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+# Home Lab State — July 21, 2026
+
+## SSH Key
+- `homelab` key pair created (ed25519)
+- Deployed to: vm-host-01 (10.1.1.100), vm-host-02 (10.1.1.110), QNAP TS-1635 (10.1.1.40)
+- Also deployed to: docker-host-01 (10.1.1.14)
+- Pending: VM 100 / 10.1.1.10 (adguard tertiary)
+
+## QNAP Shared Storage
+- NFS export created: `/share/CACHEDEV4_DATA/proxmox-vms`
+- Mounted on both Proxmox hosts as `qnap-nfs` (2TB, 5% used)
+- Also available: `qnap-nfs-backups` (1TB), `qnap-nfs-iso` (1TB)
+
+## Proxmox Hosts
+
+### vm-host-01 (10.1.1.100) — 24% disk used
+| VMID | Name | Status | RAM | Origin |
+|---|---|---|---|---|
+| 100 | adguard-home | running | 2GB | Migrated from vm-host-02 |
+| 105 | docker-host-01 | running | 16GB | Original |
+
+### vm-host-02 (10.1.1.110) — 11% disk used
+**CLEARED** — all VMs migrated or destroyed. Ready for GPU installation.
+
+## Destroyed VMs (to be rebuilt later)
+- 101 — Ubuntu-Server (template, 32GB)
+- 102 — Graylog (40GB, had snapshots)
+- 103 — Zabbix (32GB, had snapshots)
+- 104 — FOG (32GB)
+
+## Services on docker-host-01
+- Mealie (9925), n8n (5678), Home Assistant (8123)
+- Jellyfin (8096), Prowlarr/Radarr/Sonarr/Sabnzbd (media pipeline)
+- AdGuard Home (53, 3000), NPM (80/443), Uptime Kuma (3001)
+- Dockhand (3100), Browser-Use WebUI (6080/7788)
+- 13 containers total, ~3.8GB RAM used of 16GB allocated
+
+## DNS Chain
+- Primary: docker-host-01 AdGuard (10.1.1.14)
+- Secondary: app2 Technitium (dns1.itpropartner.com / 152.53.39.202)
+- Tertiary: vm-host-01 AdGuard (10.1.1.10)