Support Serialization

Issue gh-16276

web/src/main/java/org/springframework/security/web/savedrequest/SimpleSavedRequest.java

@@ -16,6 +16,7 @@
 
 package org.springframework.security.web.savedrequest;
 
+import java.io.Serial;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
@@ -35,6 +36,9 @@ import org.springframework.util.Assert;
  */
 public class SimpleSavedRequest implements SavedRequest {
 
+	@Serial
+	private static final long serialVersionUID = 807650604272166969L;
+
 	private String redirectUrl;
 
 	private List<Cookie> cookies = new ArrayList<>();