Reply To: Image ID's

For anyone look to do the same, here’s how:

Install the Code Snippets plugin.

Add a new snippet with the following code:

add_action( 'cn_post_process_add-entry', 'cn_insert_image_into_media_library' );
add_action( 'cn_post_process_update-entry', 'cn_insert_image_into_media_library' );

function cn_insert_image_into_media_library( $entry ) {

    $image = $entry->getimageMeta();

    if ( ! is_wp_error( $image ) ) {

        /* 
         * Read the contents of the upload directory. We need the
         * path to copy the file and the URL for uploading the file.
         */
        $uploads = wp_upload_dir();
        $uploads_dir = $uploads['path'];
        $uploads_url = $uploads['url'];

        // Copy the file from the root directory to the uploads directory
        copy( $image['path'], trailingslashit( $uploads_dir ) . $image['name'] );

        /* 
         * Get the URL to the file and grab the file and load 
         * it into WordPress (and the Media Library)
         */
        $url = trailingslashit( $uploads_url ) . $image['name'];
        $result = media_sideload_image( $url, 0, $image['name'] );

        // If there's an error, then we'll write it to the error log.
        if ( is_wp_error( $result ) ) {
            error_log( print_r( $result, true ) );
        }
    }
}

Save and Activate the new snippet.

Now, anytime a photo is uploaded, whether it is on an entry being added or an entry being updated, it will be duplicated in the Media Library.