Fixing build errors with Spring Boot 4.0.1

Signed-off-by: qnnn <qiunan@cmbchina.com>

Author: ryanjbaxter

spring-cloud-context/pom.xml

@@ -15,6 +15,10 @@
 	<name>Spring Cloud Context</name>
 	<description>Spring Cloud Context</description>
 	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-restclient</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-configuration-processor</artifactId>

spring-cloud-loadbalancer/src/main/java/org/springframework/cloud/loadbalancer/core/SubsetServiceInstanceListSupplier.java

@@ -21,6 +21,7 @@
 import java.util.List;
 import java.util.Random;
 
+import org.jspecify.annotations.Nullable;
 import reactor.core.publisher.Flux;
 
 import org.springframework.cloud.client.ServiceInstance;
@@ -58,7 +59,12 @@ public SubsetServiceInstanceListSupplier(ServiceInstanceListSupplier delegate, P
 
 	@Override
 	public Flux<List<ServiceInstance>> get() {
-		return get(null);
+		return get(new Request() {
+			@Override
+			public @Nullable Object getContext() {
+				return Request.super.getContext();
+			}
+		});
 	}
 
 	@Override