refactor(deps): use foundation shared utilities

internal/service/token.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"strconv"
 
-	"github.com/ez-api/ez-api/internal/util"
+	"github.com/ez-api/foundation/tokenhash"
 	"github.com/redis/go-redis/v9"
 )
 
@@ -28,7 +28,7 @@ type TokenInfo struct {
 // ValidateToken checks a child key against Redis for validity.
 // This is designed to be called by the data plane (balancer).
 func (s *TokenService) ValidateToken(ctx context.Context, token string) (*TokenInfo, error) {
-	tokenHash := util.HashToken(token)
+	tokenHash := tokenhash.HashToken(token)
 	tokenKey := fmt.Sprintf("auth:token:%s", tokenHash)
 
 	// 1. Get token metadata from Redis