This endpoint only performs validation and does not persist any changes.
It checks:

• The Earn & Burn service exists and is available for the current business.
• The requested service to redeem exists.
• The customer has an active loyalty card for the Earn & Burn service.
• The Earn & Burn configuration exists for the requested redeemable service.
• Stock availability (when the configuration enforces a stock limit).
• The customer has enough points to redeem the service.

The response indicates eligibility via CanBeRedeemed and provides a reason in ErrorType when not eligible.