fix(ember): Disable performance in FastBoot (#7282)

We do not want to run the instance initializer in fastboot env, as that relies on Browser stuff.

Author: mydea

packages/ember/addon/instance-initializers/sentry-performance.ts

@@ -25,6 +25,12 @@ function getSentryConfig() {
 }
 
 export function initialize(appInstance: ApplicationInstance): void {
+  // Disable in fastboot - we only want to run Sentry client-side
+  const fastboot = appInstance.lookup('service:fastboot') as { isFastBoot: boolean } | undefined;
+  if (fastboot?.isFastBoot) {
+    return;
+  }
+
   const config = getSentryConfig();
   if (config['disablePerformance']) {
     return;