enable watchdog as early as possible.

sometimes ble init seems to fail somehow.
this caused hangs at different points in time.
with this change the device at least resets relatively quickly.

src/main.c

 }
 
 int main(void) {
+    watchdog_enable(WATCHDOG_PERIOD_MS, 1);
+
     // required for debug console
     cnsl_init();
     serial_init();
 
     debug("lcd_init");
     lcd_init();
+
+    watchdog_update();
+
+    debug("draw_splash");
     draw_splash();
     lcd_set_backlight(mem_data()->backlight);
 
     debug("cyw43_arch_init");
     if (cyw43_arch_init()) {
         debug("cyw43_arch_init failed");
+        lcd_set_backlight(0x00FF);
+        while (1) {}
     }
 
+    watchdog_update();
+
     debug("heartbeat_init");
     heartbeat_init();
 
     msc_set_medium_available(true);
 #endif // AUTO_MOUNT_MASS_STORAGE
 
-    watchdog_enable(WATCHDOG_PERIOD_MS, 1);
+    watchdog_update();
 
     debug("init done");
     battery_run();