Ethical Contact Data Scraper

I need an ethical hacker with solid scraping experience to pull phone numbers and email addresses from a public website that I own and have full permission to access. The task is strictly white-hat: respect robots.txt, mimic human-level traffic, and keep the server load minimal while still covering every relevant page.

What I expect from you:

• A clean, well-commented script (Python, Node, or your preferred language) that crawls the site and extracts each phone number and email into a tidy CSV or Excel file.
• Simple configuration options so I can rerun the scraper whenever content updates.
• Clear, step-by-step instructions for setup and execution on Windows or Linux.

Acceptance criteria: the final dataset contains all available contact details, duplicates removed, with the code ready for me to run locally without additional tweaks.

Let me know your preferred libraries or frameworks (BeautifulSoup, Scrapy, Selenium, Puppeteer, etc.) and a concise timeline for delivery.