[9.2] [APM] Hide non-trace services in Service Inventory (#241080) (#241307)

# Backport

This will backport the following commits from `main` to `9.2`:
- [[APM] Hide non-trace services in Service Inventory
(#241080)](#241080)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT [{"author":{"name":"Sergi
Romeu","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-10-30T14:57:21Z","message":"[APM]
Hide non-trace services in Service Inventory
(#241080)","sha":"f9c400044e589946a2874c36ab4535533215a139","branchLabelMapping":{"^v9.3.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","apm:service-inventory","ci:project-deploy-observability","Team:obs-ux-infra_services","backport:version","v9.3.0","v8.19.7","v9.1.7","v9.2.1"],"title":"[APM]
Hide non-trace services in Service
Inventory","number":241080,"url":"https://github.com/elastic/kibana/pull/241080","mergeCommit":{"message":"[APM]
Hide non-trace services in Service Inventory
(#241080)","sha":"f9c400044e589946a2874c36ab4535533215a139"}},"sourceBranch":"main","suggestedTargetBranches":["8.19","9.1","9.2"],"targetPullRequestStates":[{"branch":"main","label":"v9.3.0","branchLabelMappingKey":"^v9.3.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/241080","number":241080,"mergeCommit":{"message":"[APM]
Hide non-trace services in Service Inventory
(#241080)","sha":"f9c400044e589946a2874c36ab4535533215a139"}},{"branch":"8.19","label":"v8.19.7","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"9.1","label":"v9.1.7","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"9.2","label":"v9.2.1","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Sergi Romeu <[email protected]>

Author: kibanamachine

x-pack/solutions/observability/plugins/apm/server/routes/services/get_services/get_service_transaction_stats.ts

@@ -61,6 +61,7 @@ export interface ServiceTransactionStatsResponse {
     transactionErrorRate?: number;
     throughput?: number;
   }>;
+  maxCountExceeded: boolean;
   serviceOverflowCount: number;
 }
 
@@ -164,6 +165,8 @@ export async function getServiceTransactionStats({
     },
   });
 
+  const maxCountExceeded = (response.aggregations?.sample.services.sum_other_doc_count ?? 0) > 0;
+
   return {
     serviceStats:
       response.aggregations?.sample.services.buckets.map((bucket) => {
@@ -198,6 +201,7 @@ export async function getServiceTransactionStats({
             : undefined,
         };
       }) ?? [],
+    maxCountExceeded,
     serviceOverflowCount: response.aggregations?.sample?.overflowCount?.value || 0,
   };
 }

x-pack/solutions/observability/plugins/apm/server/routes/services/get_services/get_services_items.ts

@@ -15,7 +15,6 @@ import type { MlClient } from '../../../lib/helpers/get_ml_client';
 import type { RandomSampler } from '../../../lib/helpers/get_random_sampler';
 import { withApmSpan } from '../../../utils/with_apm_span';
 import { getHealthStatuses } from './get_health_statuses';
-import { getServicesWithoutTransactions } from './get_services_without_transactions';
 import { getServicesAlerts } from './get_service_alerts';
 import { getServiceTransactionStats } from './get_service_transaction_stats';
 import type { MergedServiceStat } from './merge_service_stats';
@@ -75,35 +74,26 @@ export async function getServicesItems({
       searchQuery,
     };
 
-    const [
-      { serviceStats, serviceOverflowCount },
-      { services: servicesWithoutTransactions, maxCountExceeded },
-      healthStatuses,
-      alertCounts,
-    ] = await Promise.all([
-      getServiceTransactionStats({
-        ...commonParams,
-        apmEventClient,
-      }),
-      getServicesWithoutTransactions({
-        ...commonParams,
-        apmEventClient,
-      }),
-      getHealthStatuses({ ...commonParams, mlClient }).catch((err) => {
-        logger.debug(err);
-        return [];
-      }),
-      getServicesAlerts({ ...commonParams, apmAlertsClient }).catch((err) => {
-        logger.debug(err);
-        return [];
-      }),
-    ]);
+    const [{ serviceStats, serviceOverflowCount, maxCountExceeded }, healthStatuses, alertCounts] =
+      await Promise.all([
+        getServiceTransactionStats({
+          ...commonParams,
+          apmEventClient,
+        }),
+        getHealthStatuses({ ...commonParams, mlClient }).catch((err) => {
+          logger.debug(err);
+          return [];
+        }),
+        getServicesAlerts({ ...commonParams, apmAlertsClient }).catch((err) => {
+          logger.debug(err);
+          return [];
+        }),
+      ]);
 
     return {
       items:
         mergeServiceStats({
           serviceStats,
-          servicesWithoutTransactions,
           healthStatuses,
           alertCounts,
         }) ?? [],