Add GLC network infrastructure

sites/glc/network.md

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+# Grand Lake Club — Network Infrastructure
+
+## Site
+- **Name:** Grand Lake Club
+- **Host:** GLC UDM Pro
+- **Site ID:** 66770d7ed634742ade16b848
+- **Host ID:** AC8BA96EDB4F0000000007153E2D00000000076AA09A0000000063974676:10670668
+- **WAN IP:** 75.62.181.131
+- **Controller:** Standalone UDM Pro (not adopted to ITPP controller)
+
+## Credentials
+- **Network API Key:** Secured in Hermes vault
+- **Hudu:** Pending
+
+## Access
+- **On-site only:** UDM Pro API not exposed to internet (NAT)
+- **Remote access needed:** Teleport VPN or UniFi Cloud API
+
+## Backup Status
+- ❌ No automated backup — requires remote access
+## Last Verified
+- July 15, 2026 — key provided, not yet verified