fix(otel): fetch the trace and span ids in user context instead of co…

…ntext

middleware.go

@@ -179,7 +179,7 @@ func NewWithConfig(logger *slog.Logger, config Config) fiber.Handler {
 		}
 
 		// otel
-		baseAttributes = append(baseAttributes, extractTraceSpanID(c.Context(), config.WithTraceID, config.WithSpanID)...)
+		baseAttributes = append(baseAttributes, extractTraceSpanID(c.UserContext(), config.WithTraceID, config.WithSpanID)...)
 
 		// request body
 		requestAttributes = append(requestAttributes, slog.Int("length", len((c.Body()))))