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

This reverts commit 4e24f9bbb0.

internal/mappers/spin_game_mapper.go

@@ -38,7 +38,8 @@ func SpinGameResponseDataModelToContract(data *models.SpinGameResponseData) *con
 	return &contract.SpinGameResponseData{
 		GamePlay:        GamePlayResponseModelToContract(&data.GamePlay),
 		PrizeWon:        CustomerGamePrizeResponseModelToContract(data.PrizeWon),
-		TokensRemaining: data.TokensRemaining,
+		CoinsRemaining:  data.CoinsRemaining,
+		TokensRemaining: data.CoinsRemaining,
 	}
 }
 
@@ -53,7 +54,8 @@ func GamePlayResponseModelToContract(resp *models.GamePlayResponse) contract.Gam
 		GameID:     resp.GameID,
 		CustomerID: resp.CustomerID,
 		PrizeID:    resp.PrizeID,
-		TokenUsed:  resp.TokenUsed,
+		CoinsUsed:  resp.CoinsUsed,
+		TokenUsed:  resp.CoinsUsed,
 		RandomSeed: resp.RandomSeed,
 		CreatedAt:  resp.CreatedAt,
 		Game:       nil, // Optional field - can be populated separately if needed