Unified QR response

[Sak1012]

This PR tries to Solve Issue #191 (Integrate Check-in and Lead Scanning into a Single QR Code)

Since both the codes are generated on a order they are now embedded into a single QR in the following json format

{
  "ticket": "5uhbd49wms2fakafn5nzq7pcqpbjun2v",
  "lead": "PZD97WTMFJ"
}

Summary by Sourcery

Unify the QR code generation by embedding both the ticket and lead information into a single JSON object, allowing for integrated check-in and lead scanning functionality.

New Features:

• Integrate check-in and lead scanning into a single QR code by embedding both codes into a unified JSON format.