docs: update CT126 details (Headscale v0.28.0 control server, 17 nodes)

CT126 runs Headscale v0.28.0 as self-hosted Tailscale control server
with 17 devices (Mac, iPhone, Android, Apple TV, Linux servers).
Ports 8080/9090/50443 forwarded via OpenWRT DNAT. Also runs Tailscale
client and Watchtower. Updated PVE description and tags.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

PVECluster_Architecture.md

@@ -133,7 +133,7 @@ Proxmox Backup Server (192.168.42.30, VM 111)
 | **118** | CT118 | pve-03 | running | 2C | 2 GB | 8G (syno-lvm) | DHCP | Podman + PostgreSQL |
 | **119** | CT119 | pve | **stopped** | 1C | 64 MB | 8G (syno-lvm) | .42.119 | Gotify 推播伺服器 |
 | **124** | CT124 | pve-03 | running | 2C | 8 GB | 80G (syno-lvm) | .42.124 | NPM + Keycloak + Karakeep + Watchtower |
-| **126** | CT126 | pve | running | 1C | 256 MB | 8G (syno-lvm) | .42.126 | Headscale |
+| **126** | CT126 | pve | running | 1C | 256 MB | 8G (syno-lvm) | .42.126 | Headscale v0.28.0 控制伺服器 (17 節點) + Tailscale + Watchtower |
 
 ### 狀態統計
 
@@ -195,7 +195,7 @@ Proxmox Backup Server (192.168.42.30, VM 111)
 │   CT100 ─────────── SSH Jump Box + Bore Tunnel                   │
 │   CT101 ─────────── Headscale + RustDesk（遠端存取）             │
 │   CT102 ─────────── Tailscale + Cloudflare Tunnel + Proxy Pool    │
-│   CT126 ─────────── Headscale                                    │
+│   CT126 ─────────── Headscale 控制伺服器 (17 節點, 8080/9090/50443) │
 │                                                                   │
 │  【應用服務】                                                     │
 │   CT115 Lydia ───── Production（4C/2GB/40G）                     │

SUMMARY.md

@@ -51,7 +51,7 @@
 | SSH Jump + Bore Tunnel | CT 100 | .42.100 | pve-02 | running |
 | Headscale + RustDesk | CT 101 | .42.101 | pve-02 | running |
 | Tailscale + Cloudflare Tunnel + Proxy Pool | CT 102 | .42.102 | pve | running |
-| Headscale | CT 126 | .42.126 | pve | running |
+| Headscale 控制伺服器 (17 節點) | CT 126 | .42.126 | pve | running |
 
 ### 認證