docs: ap-ux7-01 に VLAN 50/60 の IP を割り当て

- VLAN 50 (Guest): 10.0.50.21
- VLAN 60 (IoT):   10.0.60.21
- VLAN 100 (PRV):  192.168.100.21 (既存)

network-diagram.html / ip-map.md / 増備計画.md に反映。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/増備計画.md

@@ -116,7 +116,9 @@
 | `stg-01-nas` | STORAGE | `10.0.30.11` |
 | `opnsense-01` | PRV | `192.168.100.2` |
 | `sw-flex` | PRV | `192.168.100.11` |
-| `ap-ux7-01` | PRV | `192.168.100.21` |
+| `ap-ux7-01` | PRV (VLAN 100) | `192.168.100.21` |
+| `ap-ux7-01` | IoT (VLAN 60) | `10.0.60.21` |
+| `ap-ux7-01` | Guest (VLAN 50) | `10.0.50.21` |
 
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