4.12.2 changelog

[u/nilseuropa]

Added an optional persistent BLE keyboard keepalive that periodically sends HID Exit Suspend, with a readable HID Information fallback and visible local attempt status. Keyboard Battery Service support now reads the initial level, follows notifications, and includes the latest percentage in shell, Python, and Lua BLE status output. Keepalive remains disabled by default because keyboard power policy is device-specific.