[8.16] [APM] Fix stack trace syntax highlight (#205187)

NOTICE.txt

@@ -1,5 +1,5 @@
 Kibana source code with Kibana X-Pack source code
-Copyright 2012-2024 Elasticsearch B.V.
+Copyright 2012-2025 Elasticsearch B.V.
 
 ---
 Adapted from remote-web-worker, which was available under a "MIT" license.

x-pack/plugins/observability_solution/apm/server/routes/errors/get_error_groups/get_error_sample_details.ts

@@ -28,6 +28,7 @@ import {
   TRANSACTION_ID,
   ERROR_STACK_TRACE,
   SPAN_ID,
+  SERVICE_LANGUAGE_NAME,
 } from '../../../../common/es_fields/apm';
 import { environmentQuery } from '../../../../common/utils/environment_query';
 import { ApmDocumentType } from '../../../../common/document_type';
@@ -83,6 +84,7 @@ export async function getErrorSampleDetails({
     SPAN_ID,
     AGENT_VERSION,
     PROCESSOR_NAME,
+    SERVICE_LANGUAGE_NAME,
     ERROR_CULPRIT,
     ERROR_STACK_TRACE,
     ERROR_EXC_MESSAGE,

x-pack/test/apm_api_integration/tests/errors/group_id_samples.spec.ts

@@ -139,6 +139,10 @@ export default function ApiTest({ getService }: FtrProviderContext) {
         it('displays correct error culprit info', () => {
           expect(errorSampleDetailsResponse.error.error.culprit).to.equal('Error culprit 1');
         });
+
+        it('displays correct language name', () => {
+          expect(errorSampleDetailsResponse.error.service.language?.name).to.equal('swift');
+        });
       });
     });
 

x-pack/test/apm_api_integration/tests/mobile/errors/generate_data.ts

@@ -33,6 +33,9 @@ export async function generateData({
 }) {
   const serviceGoProdInstance = apm
     .service({ name: serviceName, environment: 'production', agentName: 'swift' })
+    .defaults({
+      'service.language.name': 'swift',
+    })
     .instance('instance-a');
 
   const interval = '1m';