Wi-Fi over USB tab for firmware with the USB console (v13)

Writes / reads / removes the box's Wi-Fi over the serial port with the
usb_console commands (kota ping, wifi set|get|clear, health) and follows
the box through the restart until it joins the network. The password is
sent hex-encoded and never logged.

firmware/ now holds merged-binary-v13.bin (build 3ae273ec) instead of the
previous 1.0.16 build; error_ids.csv synced with the firmware.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

kota_tech/diag/kota.py

@@ -39,6 +39,7 @@ I2C_DEVICES = {"0x39": "AS7341", "0x68": "DS1307", "0x6B": "SEN66", "0x76": "BME
 INTENTIONAL_RESTARTS = {
     "ota_update", "button_provisioning_abort", "button_wifi_cleared",
     "button_provisioning_toggle", "provisioning_saved",
+    "usb_wifi_set", "usb_wifi_clear",        # Wi-Fi changed from the technician tool (usb_console)
 }
 
 MODULES = {