Credibility improvements (wave 2)

Wave 2 focuses on details visitors and procurement teams notice:

• Positioning copy: founder-signed CTA, honest audience fit note, testimonial source links
• Design polish: device frames on screenshots, accent highlights, branded 404
• Technical trust: Google Consent Mode v2, RSS feeds, sitemap images, LCP preload
• Product maturity: public changelog and release notes index

More updates will land here as we ship.