Fix SpringBootPlatformHttpVirtualThreadsOptimizedTest for Spring Boot 4.0.4

Spring Boot 4.0.4's TaskExecutionAutoConfiguration uses
@ConditionalOnMissingBean(Executor.class) when auto-configuring the
SimpleAsyncTaskExecutor for virtual threads. When another Executor bean
is registered first (e.g. by Spring Security auto-configuration), the
auto-config backs off and no SimpleAsyncTaskExecutor is created, causing
the test assertion to fail.

Explicitly define a SimpleAsyncTaskExecutor bean in the test's
TestConfiguration using SimpleAsyncTaskExecutorBuilder, matching the
approach used by the passing
SpringBootPlatformHttpMultipleExecutorsVirtualThreadsTest.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

components-starter/camel-platform-http-starter/src/test/java/org/apache/camel/component/platform/http/springboot/SpringBootPlatformHttpVirtualThreadsOptimizedTest.java

diff --git a/components-starter/camel-platform-http-starter/src/test/java/org/apache/camel/component/platform/http/springboot/SpringBootPlatformHttpVirtualThreadsOptimizedTest.java b/components-starter/camel-platform-http-starter/src/test/java/org/apache/camel/component/platform/http/springboot/SpringBootPlatformHttpVirtualThreadsOptimizedTest.java
index ce3f3f0..9062616 100644
--- a/components-starter/camel-platform-http-starter/src/test/java/org/apache/camel/component/platform/http/springboot/SpringBootPlatformHttpVirtualThreadsOptimizedTest.java
+++ b/components-starter/camel-platform-http-starter/src/test/java/org/apache/camel/component/platform/http/springboot/SpringBootPlatformHttpVirtualThreadsOptimizedTest.java
@@ -25,6 +25,7 @@
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.boot.task.SimpleAsyncTaskExecutorBuilder;
 import org.springframework.core.task.SimpleAsyncTaskExecutor;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.web.SecurityFilterChain;
@@ -62,6 +63,11 @@
         }
 
         @Bean
+        public SimpleAsyncTaskExecutor simpleAsyncTaskExecutor(SimpleAsyncTaskExecutorBuilder simpleAsyncTaskExecutorBuilder) {
+            return simpleAsyncTaskExecutorBuilder.build();
+        }
+
+        @Bean
         public RouteBuilder servletPlatformHttpRouteBuilder() {
             return new RouteBuilder() {
                 @Override