feat: integrate Cloudflare Turnstile for enhanced security in sign-up and email verification processes. Implement rate limiting for sign-up attempts and add Turnstile validation to prevent abuse. Update environment configuration to support Turnstile keys and enhance user experience with improved error handling and feedback.
feat: add sitemap.xml endpoint and improve SEO metadata across web application. Update landing page and root route with Open Graph and Twitter Card tags, enhance environment configuration for site URL, and introduce robots.txt for better search engine indexing. Include Umami analytics script for tracking user interactions.
