Add VLAN setup documentation - complete implementation

- docs/12-VLAN-SETUP-PROGRESS.md: Progress tracking during setup
- docs/13-VLAN-SETUP-PLAN-V2.md: Initial VLAN plan
- docs/14-VLAN-SETUP-PLAN-V3-SAFE-MODE.md: Safe mode approach
- docs/15-VLAN-SETUP-COMPLETE-2026-01-31.md: Final session summary

VLANs implemented:
- VLAN 10: Management (192.168.10.0/24) - port-based
- VLAN 20: Trusted (192.168.20.0/24) - WiFi MAC-based
- VLAN 25: Kids (192.168.25.0/24) - WiFi MAC-based
- VLAN 30: IoT (192.168.30.0/24) - WiFi MAC-based
- VLAN 40: Catch-All (192.168.1.0/24) - default

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

docs/04-HARDWARE-INVENTORY.md

@@ -1,6 +1,6 @@
 # Hardware Inventory
 
-**Last Updated:** 2026-01-25
+**Last Updated:** 2026-01-27
 
 ---
 
@@ -38,8 +38,10 @@
 | **Location** | 19" Rack U1 |
 | **IP** | 192.168.31.9 |
 | **MAC** | F4:1E:57:C9:BD:09 |
-| **OS** | SwOS |
+| **OS** | SwOS 2.16 |
 | **Serial** | - |
+| **Docs** | https://help.mikrotik.com/docs/spaces/UM/pages/17498168/CSS326-24G-2S+RM |
+| **Web UI** | http://192.168.31.9 |
 
 **Ports:** 24x 1G RJ45, 2x 10G SFP+
 - SFP1: 10G DAC to ZX1