add_comment_to_post
Add a comment to a LinkedIn post — works on the user's own published posts (use postId from get_published_posts) AND on any other public post (use the urn returned by read_linkedin_post as post_id). Some post types (reshares, restricted posts) may reject comments — this is a LinkedIn limitation, not a bug. IMPORTANT: this posts under the user's real LinkedIn identity, visible to everyone who sees that post.