fix: Add settings reset on start init priority.

* Add a dedicated settings reset on start init priority and default
  it to lower priority (high number) than default FLASH_INIT_PRIORITY
  to be sure flash is initialized before we open the area.

app/Kconfig

@@ -568,6 +568,15 @@ if SETTINGS
 config ZMK_SETTINGS_RESET_ON_START
     bool "Delete all persistent settings when the keyboard boots"
 
+if ZMK_SETTINGS_RESET_ON_START
+
+config ZMK_SETTINGS_RESET_ON_START_INIT_PRIORITY
+    int "Settings Reset ON Start Initialization Priority"
+    default 60
+
+endif
+
+
 config ZMK_SETTINGS_SAVE_DEBOUNCE
     int "Milliseconds to debounce settings saves"
     default 60000

app/src/settings/reset_settings_on_start.c

@@ -10,4 +10,4 @@
 
 // Reset after the kernel is initialized but before any application code to
 // ensure settings are cleared before anything tries to use them.
-SYS_INIT(zmk_settings_erase, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+SYS_INIT(zmk_settings_erase, POST_KERNEL, CONFIG_ZMK_SETTINGS_RESET_ON_START_INIT_PRIORITY);