Document Umami as the sole analytics platform, remove Rybbit proxy and
tracker code, and classify public page traffic with discovery_channel for
adm SEO/GEO dashboards.
Co-authored-by: Cursor <cursoragent@cursor.com>
Umami creator labels read event_data.username; server events only sent
owner_label, so dashboards fell back to MindSpace UUID path segments.
Co-authored-by: Cursor <cursoragent@cursor.com>