You are a Python developer. Write a script that given a list of LinkedIn profile URLs, scrapes public information (name, headline, summary, experience). Use Selenium. The script must: 1) Log in with credentials, 2) Navigate to each profile, 3) Extract relevant fields, 4) Save to CSV, 5) Handle pagination for experience, 6) Add delays to avoid detection, 7) Handle profiles that require login. Add comments and a README.