[APM][Errors] Fix: Missing summary data in in error sample (elastic#2…

…13430)

Closes elastic#213418
## Summary

This PR fixes the missing error sample summary by adding the missing
fields

Bug (Before) | Fix (After)
|-----------------------|-----------|
| <img width="1912" alt="image"
src="https://github.com/user-attachments/assets/f7a9b007-529d-422d-b0e2-eac2e06c26b1"
/> |
![image](https://github.com/user-attachments/assets/c31ef1f6-44fd-442f-a12e-d3df0790cdc5)
|

## Testing
- Find a service with errors (using edge oblt data or any data that
includes the field values shown)
- Click on the service and navigate to Errors tab
- The Error sample should include the summary data

![image](https://github.com/user-attachments/assets/c86fdc3e-cd88-46b5-a59a-e1b8c7d44bef)

(cherry picked from commit 36e930c)

x-pack/platform/packages/shared/kbn-apm-types/src/es_fields/apm.ts

@@ -48,6 +48,7 @@ export const HTTP_RESPONSE_STATUS_CODE = 'http.response.status_code';
 export const USER_ID = 'user.id';
 export const USER_AGENT_ORIGINAL = 'user_agent.original';
 export const USER_AGENT_NAME = 'user_agent.name';
+export const USER_AGENT_VERSION = 'user_agent.version';
 
 export const OBSERVER_VERSION = 'observer.version';
 export const OBSERVER_VERSION_MAJOR = 'observer.version_major';

x-pack/solutions/observability/plugins/apm/public/components/app/error_group_details/error_sampler/error_sample_detail.tsx

@@ -158,6 +158,7 @@ export function ErrorSampleDetails({
   const errorUrl = error.error.page?.url || error.url?.full;
   const method = error.http?.request?.method;
   const status = error.http?.response?.status_code;
+  const userAgent = error?.user_agent;
   const environment = error.service.environment;
   const serviceVersion = error.service.version;
   const isUnhandled = error.error.exception?.[0]?.handled === false;
@@ -249,9 +250,7 @@ export function ErrorSampleDetails({
             errorUrl && method ? (
               <HttpInfoSummaryItem url={errorUrl} method={method} status={status} />
             ) : null,
-            transaction && transaction.user_agent ? (
-              <UserAgentSummaryItem {...transaction.user_agent} />
-            ) : null,
+            userAgent?.name ? <UserAgentSummaryItem {...userAgent} /> : null,
             transaction && (
               <EuiToolTip
                 content={i18n.translate('xpack.apm.errorSampleDetails.relatedTransactionSample', {

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

@@ -29,6 +29,12 @@ import {
   ERROR_STACK_TRACE,
   SPAN_ID,
   SERVICE_LANGUAGE_NAME,
+  URL_FULL,
+  HTTP_REQUEST_METHOD,
+  HTTP_RESPONSE_STATUS_CODE,
+  TRANSACTION_PAGE_URL,
+  USER_AGENT_NAME,
+  USER_AGENT_VERSION,
 } from '../../../../common/es_fields/apm';
 import { environmentQuery } from '../../../../common/utils/environment_query';
 import { ApmDocumentType } from '../../../../common/document_type';
@@ -42,6 +48,7 @@ export interface ErrorSampleDetailsResponse {
   transaction: Transaction | undefined;
   error: Omit<APMError, 'transaction' | 'error'> & {
     transaction?: { id?: string; type?: string };
+    user_agent?: { name?: string; version?: string };
     error: {
       id: string;
     } & Omit<APMError['error'], 'exception' | 'log'> & {
@@ -90,6 +97,12 @@ export async function getErrorSampleDetails({
     ERROR_EXC_MESSAGE,
     ERROR_EXC_HANDLED,
     ERROR_EXC_TYPE,
+    URL_FULL,
+    HTTP_REQUEST_METHOD,
+    HTTP_RESPONSE_STATUS_CODE,
+    TRANSACTION_PAGE_URL,
+    USER_AGENT_NAME,
+    USER_AGENT_VERSION,
   ] as const);
 
   const params = {