Fix ZX1 switch IP address in documentation

- Actual IP: 192.168.31.22 (was documented as .7)
- Verified via ARP table and web interface access

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

docs/01-NETWORK-MAP.md

@@ -33,7 +33,7 @@ flowchart TB
     end
 
     subgraph Rack10["10" Rack (9U)"]
-        ZX1["ZX1 | ZX-SWTGW218AS<br/>192.168.31.7"]
+        ZX1["ZX1 | ZX-SWTGW218AS<br/>192.168.31.22"]
         PP2["PP2 | 12-port"]
         XTRMU["XTRM-U<br/>192.168.31.2"]
     end
@@ -63,7 +63,7 @@ flowchart TB
 |---|--------|-------|-----|-------|
 | U9 | Shelf + ISP Gateway | Vivacom ONT | 62.73.120.2 | WAN |
 | U8 | PP2 | 10" 12-port Cat6a | - | Patch panel |
-| U7 | Shelf + ZX1 | ZX-SWTGW218AS | 192.168.31.7 | 8x2.5G + 2x10G SFP+ |
+| U7 | Shelf + ZX1 | ZX-SWTGW218AS | 192.168.31.22 | 8x2.5G + 2x10G SFP+ |
 | U6 | (empty) | - | - | Reserved for XTRM-N1 |
 | U1-U4 | XTRM-U | NAS Server | 192.168.31.2 | 4x 2.5GbE bond |
 
@@ -97,7 +97,7 @@ flowchart TB
 | 192.168.31.1 | HAP1 \| hAP ax³ | Router | 78:9A:18:2C:A5:48 |
 | 192.168.31.2 | XTRM-U | Server | A8:B8:E0:02:B6:15 |
 | 192.168.31.6 | CAP \| cAP XL ac | Access Point | 18:FD:74:54:3D:BC |
-| 192.168.31.7 | ZX1 \| ZX-SWTGW218AS | Switch | 1C:2A:A3:1E:78:67 |
+| 192.168.31.22 | ZX1 \| ZX-SWTGW218AS | Switch | 1C:2A:A3:1E:78:67 |
 | 192.168.31.9 | CSS1 \| CSS326-24G-2S+ | Switch | F4:1E:57:C9:BD:09 |
 
 #### Containers (br0 Macvlan)

docs/02-PORT-UTILIZATION.md

@@ -68,7 +68,7 @@ Port Details:
 
 ---
 
-## ZX1 | ZX-SWTGW218AS (192.168.31.7)
+## ZX1 | ZX-SWTGW218AS (192.168.31.22)
 
 ```
 ┌─────────────────────────────────────────────────────────┐

docs/06-CHANGELOG.md

@@ -48,3 +48,6 @@ See git history for earlier changes.
 
 ### Network
 - [NETWORK] Enabled CSS326 SFP1 port - 10G backbone link to ZX1 now active
+
+### Documentation Fix
+- [DOCS] Fixed ZX1 switch IP: 192.168.31.22 (was incorrectly documented as .7)