Duplicate wp_options Entries from Elementor Image Optimiser

Hi there,

I'm using the Elementor Image Optimiser plugin `(v1.6.5)` and noticed it repeatedly creates duplicate entries in the wp_options table, such as:

`image_optimizer_convert_to_format`
`image_optimizer_compression_level`
`image_optimizer_custom_sizes`

On inspection, I found the issue in:

`/modules/settings/module.php
Line 79:
add_option( self::SETTING_PREFIX . $key, $args['default'] );`

Using `add_option()` without checking for the option's existence leads to duplicate rows if this function is called repeatedly - especially if the prefix is reused.

Change this line to:

`if ( false === get_option( self::SETTING_PREFIX . $key ) ) {
add_option( self::SETTING_PREFIX . $key, $args['default'] );
}`

Or even better: use `update_option()` instead of `add_option()` — this is safer and avoids duplicate rows entirely.

Thanks!