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

@@ -47,6 +47,8 @@ void main_loop_hw(void) {
 }
 
 int main(void) {
+    watchdog_enable(WATCHDOG_PERIOD_MS, 1);
+
     // required for debug console
     cnsl_init();
     serial_init();
@@ -57,6 +59,10 @@ int main(void) {
 
     debug("lcd_init");
     lcd_init();
+
+    watchdog_update();
+
+    debug("draw_splash");
     draw_splash();
     lcd_set_backlight(mem_data()->backlight);
 
@@ -75,8 +81,12 @@ int main(void) {
     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();
 
@@ -93,7 +103,7 @@ int main(void) {
     msc_set_medium_available(true);
 #endif // AUTO_MOUNT_MASS_STORAGE
 
-    watchdog_enable(WATCHDOG_PERIOD_MS, 1);
+    watchdog_update();
 
     debug("init done");
     battery_run();