Add detailed error logging for SSO authentication failures

- Log specific SSO authentication error code and message
- Improve error traceability and debugging for authentication middleware

internal/middleware/auth.go

@@ -84,6 +84,7 @@ func AuthMiddleware(ssoUrl string) gin.HandlerFunc {
 
 		// Check if authentication was successful
 		if ssoResp.Code != "OK" {
+			log.Error().Msgf("sso authentication failed, code: %s, message: %s", ssoResp.Code, ssoResp.Message)
 			utils.AssembleResponse(c, nil, utils.ErrUnauthorized)
 			c.Abort()
 			return