Add Missing Serialization Support

Closed gh-19012

Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>

saml2/saml2-service-provider/src/main/java/org/springframework/security/saml2/provider/service/authentication/Saml2AuthenticationToken.java

@@ -16,6 +16,7 @@
 
 package org.springframework.security.saml2.provider.service.authentication;
 
+import java.io.Serial;
 import java.util.Collections;
 
 import org.springframework.security.authentication.AbstractAuthenticationToken;
@@ -33,6 +34,9 @@ import org.springframework.util.Assert;
  */
 public class Saml2AuthenticationToken extends AbstractAuthenticationToken {
 
+	@Serial
+	private static final long serialVersionUID = 5225098478444036532L;
+
 	private final RelyingPartyRegistration relyingPartyRegistration;
 
 	private final String saml2Response;

saml2/saml2-service-provider/src/main/java/org/springframework/security/saml2/provider/service/registration/OpenSamlRelyingPartyRegistration.java

@@ -42,6 +42,7 @@ import org.springframework.security.saml2.core.Saml2X509Credential;
  * </pre>
  */
 @Deprecated
+@SuppressWarnings("serial")
 public final class OpenSamlRelyingPartyRegistration extends RelyingPartyRegistration {
 
 	OpenSamlRelyingPartyRegistration(RelyingPartyRegistration registration) {