Fix the Logback reset test when another test's context is cached

When MvcIntegrationTest runs first, its cached application context keeps
its own appender on the shared root logger, so asserting that no appender
named EXCEPTIONLESS remains failed depending on test-class order (CI vs
local). Assert only on the appenders this test's context added.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: ejsmith

exceptionless-spring-boot-starter/src/test/java/com/exceptionless/spring/boot/ExceptionlessAutoConfigurationTest.java

@@ -346,19 +346,23 @@ void addsLogbackAppenderWhileTheContextRuns() {
   void addsTheAppenderAgainWhenLogbackIsReset() throws Exception {
     LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
     AtomicReference<LogbackAppenderRegistration> registration = new AtomicReference<>();
+    List<ExceptionlessAppender> added = new ArrayList<>();
     try {
       runner.run(
           context -> {
             ExceptionlessClient client = context.getBean(ExceptionlessClient.class);
             registration.set(context.getBean(LogbackAppenderRegistration.class));
             ExceptionlessAppender original = registration.get().getAppender();
+            assertThat(original).isNotNull();
+            added.add(original);
             assertThat(rootAppenders()).contains(original);
 
             // What Logback does when it reloads a changed logback.xml (scan="true").
             loggerContext.reset();
 
             ExceptionlessAppender replacement = registration.get().getAppender();
             assertThat(replacement).isNotNull().isNotSameAs(original);
+            added.add(replacement);
             assertThat(replacement.isStarted()).isTrue();
             assertThat(original.isStarted()).isFalse();
             assertThat(rootAppenders()).contains(replacement).doesNotContain(original);
@@ -368,8 +372,8 @@ void addsTheAppenderAgainWhenLogbackIsReset() throws Exception {
                 .extracting(e -> e.get("message"))
                 .contains("After reset");
           });
-      assertThat(rootAppenders())
-          .noneMatch(a -> LogbackAppenderRegistration.APPENDER_NAME.equals(a.getName()));
+      // Only this context's appenders: a cached context from another test class can have its own.
+      assertThat(rootAppenders()).doesNotContainAnyElementsOf(added);
       assertThat(loggerContext.getCopyOfListenerList()).doesNotContain(registration.get());
     } finally {
       // Restore the default configuration (logback-test.xml or Logback's defaults).