add: Traefik route for dsm.kavcorp.com

Added Synology DSM access via Traefik at dsm.kavcorp.com
Backend: http://10.4.2.13:5001 (DSM uses HTTP on this port)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/CHANGELOG.md

@@ -2,6 +2,13 @@
 
 > **Purpose**: Historical record of all significant infrastructure changes
 
+## 2026-01-02
+
+### Synology DSM Traefik Route
+- Added Traefik route for `dsm.kavcorp.com` → KavNas DSM (10.4.2.13:5001)
+- Config: `/etc/traefik/conf.d/dsm.yaml`
+- Note: DSM is serving HTTP on port 5001 (not HTTPS), Traefik terminates TLS
+
 ## 2025-12-28
 
 ### Guest VLAN Traefik Access