docs: Update infrastructure state with diagrams and cleanup

docs/06-CHANGELOG.md

@@ -251,3 +251,31 @@ See git history for earlier changes.
 - netbox-redis (was 172.18.0.63)
 
 ---
+
+## 2026-01-23 - Service Cleanup & Documentation Update
+
+### Services Removed
+- [REMOVED] Unbound - redundant (AdGuard has upstream DoH)
+- [REMOVED] DoH-Server - redundant (AdGuard has built-in DoH)
+- [REMOVED] stunnel-dot - redundant (AdGuard has built-in DoT)
+- [REMOVED] Pangolin - not in use
+
+### DNS Configuration
+- [CONFIG] Unraid AdGuard: dns2.xtrm-lab.org (was dns.xtrm-lab.org)
+- [CONFIG] MikroTik AdGuard: dns.xtrm-lab.org (primary)
+
+### Container Management
+- [LABELS] Added net.unraid.docker.managed to all containers
+- [LABELS] Added WebUI URLs to containers with web interfaces
+- [LABELS] Updated icons to PNG format (from SVG)
+
+### FolderView2
+- [CATEGORY] Added "Network Inventory" for NetBox/Diode/NetDisco
+
+### Documentation
+- [DOCS] Updated 00-CURRENT-STATE.md with current architecture
+- [DOCS] Added Mermaid diagrams for network topology
+- [DOCS] Added RAM usage statistics
+- [DOCS] Documented removed services
+
+---