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/app2-caddyfile-audit-2026-07-21.md

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+# app2 Caddyfile Audit — July 21, 2026
+
+## Root cause
+Technitium DNS was deployed on app2. During the Caddyfile rewrite to add `dns1.itpropartner.com`, two existing services were dropped:
+
+1. **UNMS** — `reverse_proxy localhost:80` failed because UNMS nginx exposes port 443 (via host 8444), not port 80. Fixed by proxying via HTTPS with `tls_insecure_skip_verify`.
+2. **Gitea** — entry was completely removed. Fixed by adding `reverse_proxy 127.0.0.1:3001`.
+
+## Prevention
+- Always audit `docker ps` output BEFORE rewriting Caddyfile
+- Verify every running container that exposes web ports has a Caddy entry
+- Test each domain with `curl -sk` after Caddy reload
+
+## Final Caddyfile (validated)
+```
+{
+    default_bind 152.53.39.202
+    auto_https disable_redirects
+}
+dns1.itpropartner.com:443 → 127.0.0.1:5380
+gps.fleettracker360.com:443 → localhost:8082
+fleettracker360.com:443 → localhost:8082
+unms.forefrontwireless.com:443 → https://localhost:8444 (tls_insecure_skip_verify)
+unifi.itpropartner.com:443 → https://localhost:8443 (tls_insecure_skip_verify)
+hudu.itpropartner.com:443 → localhost:3000
+git.itpropartner.com:443 → 127.0.0.1:3001
+```