- hal.cpp: include components/libretiny/core.h so the lt_* C API
(lt_wdt_enable, lt_reboot, lt_gpio_recover) and the LT_GPIO_RECOVER
macro are properly declared rather than relying on transitive includes.
core.h pulls <Arduino.h> which is libretiny's umbrella header.
- hal_libretiny.h: preserve the HOT attribute on arch_feed_wdt() — the
out-of-line wrapper had it; the inline now uses __attribute__((hot,
always_inline)) to keep the placement hint consistent with the other
platforms. The arch_restart() noreturn concern is already covered by
the dispatcher hal.h declaration ('void __attribute__((noreturn))
arch_restart();' is visible when the body is parsed).