API for claiming RVM reward

[gjermundgaraba]

When claiming an RVM reward, there are no existing Deposit objects in the system. This is because the RVMs are considered offline and simply sign a message that the user will need to use in order to claim their reward.

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For reference:

QR-Code Proposal:

• Format csv
  Header (1.Line)
• serial_no;receipt_id;timestamp;deposit
  Content (2. Zeile... – returned items)
• category_name;count;deposit
  Footer (last Line - Signature Validation)
• signature

Example:
90590043;121;2022-05-04T12:34:37+02;470
PET;20;15
CAN;17;10
4fab24da444bcc00756cc4209f428ce6