wifi: move hAP 5GHz from ch 149 to ch 36, fix doc drift

Channel 149 (UNII-3) is not permitted in Bulgaria/EU. The radio reached it
via country=United States, but BG-domain clients were power-restricted
there, giving a badly asymmetric link and ~38 Mbps at the desk.

Moving to 5180 MHz (ch 36), legal in BG and non-DFS, raised the same
client to ~241 Mbps.

Also corrected:
- CAP capdp datapath is vlan-id=30, not 40
- RouterOS versions: hAP, cAP XL and cAP AC are all on 7.23.3
- Added WAN baseline: ~880 Mbps down / ~720 Mbps up on a 1 Gbps ONT link

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/04-HARDWARE-INVENTORY.md

@@ -14,7 +14,7 @@
 | **Location** | 19" Rack U3 (on shelf) |
 | **IP** | 192.168.10.1 |
 | **MAC** | 78:9A:18:2C:A5:48 |
-| **OS** | RouterOS 7.20.6 |
+| **OS** | RouterOS 7.23.3 |
 | **Serial** | - |
 
 **Ports:**
@@ -77,7 +77,7 @@
 | **Location** | Corridor (ceiling) |
 | **IP** | 192.168.10.2 |
 | **MAC** | 18:FD:74:54:3D:BC |
-| **OS** | RouterOS 7.21.1 |
+| **OS** | RouterOS 7.23.3 |
 | **Serial** | HCT085KBH8B |
 | **SSH** | `ssh -i ~/.ssh/mikrotik_key -p 2222 xtrm@192.168.10.2` |