add method for TraceContextUtil

hippo4j-core/src/main/java/cn/hippo4j/core/toolkit/TraceContextUtil.java

@@ -42,6 +42,15 @@ public class TraceContextUtil {
         return val;
     }
 
+    /**
+     * set.
+     *
+     * @return
+     */
+    public static void set(String trace) {
+        MDC.put(EXECUTE_TIMEOUT_TRACE_KEY, trace);
+    }
+
     /**
      * Set execute timeout trace key.
      *