Revert "feat(loyalty): EnakPoint & EnakCoin" (#32)

This reverts merge commit 645da30, returning main to f0ff59f.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/service/point_payment_service.go

@@ -1,55 +0,0 @@
-package service
-
-import (
-	"context"
-	"errors"
-
-	"github.com/google/uuid"
-
-	"apskel-pos-be/internal/appcontext"
-	"apskel-pos-be/internal/constants"
-	"apskel-pos-be/internal/contract"
-	"apskel-pos-be/internal/processor"
-	"apskel-pos-be/internal/repository"
-)
-
-// PointPaymentService serves what the cashier needs before taking EnakPoint
-// (docs/prd-point-coin.md F9).
-type PointPaymentService interface {
-	Preview(ctx context.Context, apctx *appcontext.ContextInfo, orderID uuid.UUID) *contract.Response
-}
-
-type PointPaymentServiceImpl struct {
-	payments *processor.PointPaymentProcessor
-}
-
-func NewPointPaymentService(payments *processor.PointPaymentProcessor) *PointPaymentServiceImpl {
-	return &PointPaymentServiceImpl{payments: payments}
-}
-
-func (s *PointPaymentServiceImpl) Preview(ctx context.Context, apctx *appcontext.ContextInfo, orderID uuid.UUID) *contract.Response {
-	preview, err := s.payments.Preview(ctx, apctx.OrganizationID, orderID)
-	if err != nil {
-		return PointPaymentErrorResponse(err)
-	}
-	return contract.BuildSuccessResponse(preview)
-}
-
-// PointPaymentErrorResponse answers a refused EnakPoint payment as a bad request, PIN
-// problems with their own codes, and anything else as a server error.
-func PointPaymentErrorResponse(err error) *contract.Response {
-	var pinErr *processor.PinError
-	if errors.As(err, &pinErr) {
-		return PinErrorResponse(err)
-	}
-	code := constants.InternalServerErrorCode
-	switch {
-	case errors.Is(err, repository.ErrPointPaymentOrderNotFound):
-		code = constants.NotFoundErrorCode
-	case errors.Is(err, processor.ErrPointPaymentRejected):
-		code = constants.ValidationErrorCode
-	}
-	return contract.BuildErrorResponse([]*contract.ResponseError{
-		contract.NewResponseError(code, constants.WalletServiceEntity, err.Error()),
-	})
-}