refactor(loyalty): remove the dead customer points and tokens code

First part of PC-601 (docs/prd-point-coin.md §10.7): the code that has
had no way in since balances moved to the wallet.

- The /marketing/customer-points and /marketing/customer-tokens routes
  were commented out; their 16 handler methods, the GamificationService
  methods behind them, and the validators, transformers, mappers and
  contract/model types only they used are gone.
- CustomerPointsProcessor loses its "not implemented" stubs; it keeps the
  customer app's balance, wallet and games endpoints.
- CustomerTokensProcessor and the customer points and tokens repositories,
  wired but no longer called by anything, are gone.

What stays until its preconditions are met: the customer_points and
customer_tokens tables and their entities, which cmd/wallet-migrate still
reads, and the /customer/points, /customer/tokens aliases and the
token_used / tokens_remaining fields, until the apps no longer use them.

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

internal/repository/customer_points_repository.go

@@ -1,97 +0,0 @@
-package repository
-
-import (
-	"context"
-	"fmt"
-
-	"apskel-pos-be/internal/entities"
-
-	"gorm.io/gorm"
-)
-
-type CustomerPointsRepository interface {
-	GetCustomerTotalPoints(ctx context.Context, customerID string) (int64, error)
-	GetCustomerTotalTokens(ctx context.Context, customerID string) (int64, error)
-	GetCustomerPointsHistory(ctx context.Context, customerID string, limit int) ([]entities.CustomerPoints, error)
-	GetCustomerTokensHistory(ctx context.Context, customerID string, limit int) ([]entities.CustomerTokens, error)
-}
-
-type customerPointsRepository struct {
-	db *gorm.DB
-}
-
-func NewCustomerPointsRepository(db *gorm.DB) CustomerPointsRepository {
-	return &customerPointsRepository{
-		db: db,
-	}
-}
-
-func (r *customerPointsRepository) GetCustomerTotalPoints(ctx context.Context, customerID string) (int64, error) {
-	var totalPoints int64
-
-	err := r.db.WithContext(ctx).
-		Model(&entities.CustomerPoints{}).
-		Where("customer_id = ?", customerID).
-		Select("COALESCE(SUM(balance), 0)").
-		Scan(&totalPoints).Error
-
-	if err != nil {
-		return 0, fmt.Errorf("failed to get customer total points: %w", err)
-	}
-
-	return totalPoints, nil
-}
-
-func (r *customerPointsRepository) GetCustomerTotalTokens(ctx context.Context, customerID string) (int64, error) {
-	var totalTokens int64
-
-	err := r.db.WithContext(ctx).
-		Model(&entities.CustomerTokens{}).
-		Where("customer_id = ?", customerID).
-		Select("COALESCE(SUM(balance), 0)").
-		Scan(&totalTokens).Error
-
-	if err != nil {
-		return 0, fmt.Errorf("failed to get customer total tokens: %w", err)
-	}
-
-	return totalTokens, nil
-}
-
-func (r *customerPointsRepository) GetCustomerPointsHistory(ctx context.Context, customerID string, limit int) ([]entities.CustomerPoints, error) {
-	var pointsHistory []entities.CustomerPoints
-
-	query := r.db.WithContext(ctx).
-		Where("customer_id = ?", customerID).
-		Order("created_at DESC")
-
-	if limit > 0 {
-		query = query.Limit(limit)
-	}
-
-	err := query.Find(&pointsHistory).Error
-	if err != nil {
-		return nil, fmt.Errorf("failed to get customer points history: %w", err)
-	}
-
-	return pointsHistory, nil
-}
-
-func (r *customerPointsRepository) GetCustomerTokensHistory(ctx context.Context, customerID string, limit int) ([]entities.CustomerTokens, error) {
-	var tokensHistory []entities.CustomerTokens
-
-	query := r.db.WithContext(ctx).
-		Where("customer_id = ?", customerID).
-		Order("created_at DESC")
-
-	if limit > 0 {
-		query = query.Limit(limit)
-	}
-
-	err := query.Find(&tokensHistory).Error
-	if err != nil {
-		return nil, fmt.Errorf("failed to get customer tokens history: %w", err)
-	}
-
-	return tokensHistory, nil
-}