docs: add bare-metal HAOS (ASRock Q1900) — install, UEFI-from-SATA fix, VLAN10, ha.xtrm-lab.org repoint

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-28 23:02:08 +03:00
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 **Purpose:** Major infrastructure events only. Minor changes are in git commit messages.

+---
+## 2026-07-28
+
+### Home Assistant OS on bare-metal (ASRock Q1900TM-ITX)
+- **[HARDWARE]** New HAOS box: ASRock Q1900TM-ITX (J1900, 16 GB RAM, 128 GB mSATA). HAOS 18.1 / Core 2026.7.4. IP `192.168.10.102` (DHCP reservation, MAC D0:50:99:47:B6:BF), CSS326 Port 3 (VLAN 10).
+- **[BOOT]** ASRock Q1900 will not UEFI-boot a fixed SATA disk (boots USB only) — fixed with a manual `efibootmgr` NVRAM entry to `\EFI\BOOT\BOOTX64.EFI` from a SystemRescue live USB.
+- **[NETWORK]** No DHCP on CSS326 Kids port (Port 18, VLAN 25 not trunked to router); moved to Port 3 (VLAN 10) → immediate lease.
+- **[TRAEFIK]** Repointed `ha.xtrm-lab.org` service `192.168.10.20:8123` → `192.168.10.102:8123` (dynamic/services.yml, backup kept). Added HA `http.trusted_proxies` (192.168.10.20, 172.18.0.0/16) — required or new HA returns HTTP 400 behind the proxy.
+- **[SSH]** Installed Advanced SSH & Web Terminal add-on (key auth, protection mode off) → `ssh hassio@192.168.10.102`.
+- **[NOTE]** Old HA VM (`192.168.10.20:8123`) kept as fallback, now reachable by IP only.
+
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 ## 2026-07-08