Demo request receipt page added

The public website now includes /request-received so visitors can review the local demo request reference and safe next steps.

The Calendo Health public website now includes a demo request receipt page at /request-received.

The page reads the same non-sensitive browser receipt created by the contact form and shows the request reference, submitted time, source type, and contact path.

It keeps patient data, private clinic context, contracts, private access details, pricing commitments, and live app records out of the public receipt while giving visitors a durable place to continue safely.