Refactor error handling and utility functions; remove deprecated code and improve logging

core/utils/uuid.go

@@ -0,0 +1,18 @@
+package utils
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+
+	"github.com/akyaiy/GoSally-mvp/core/config"
+)
+
+func NewUUID() (string, error) {
+	bytes := make([]byte, int(config.GetInternalConsts().GetUUIDLength()/2))
+	_, err := rand.Read(bytes)
+	if err != nil {
+		return "", errors.New("failed to generate UUID: " + err.Error())
+	}
+	return hex.EncodeToString(bytes), nil
+}