[Infrastructure UI][Rules] Add recovery context to the Metric Threshold rule

x-pack/plugins/infra/server/lib/alerting/metric_threshold/metric_threshold_executor.ts

@@ -246,6 +246,23 @@ export const createMetricThresholdExecutor = (libs: InfraBackendLibs) =>
         });
       }
     }
+
+    const { getRecoveredAlerts } = services.alertFactory.done();
+    const recoveredAlerts = getRecoveredAlerts();
+    for (const alert of recoveredAlerts) {
+      const recoveredAlertId = alert.getId();
+      const viewInAppUrl = getViewInAppUrl(libs.basePath, LINK_TO_METRICS_EXPLORER);
+      const context = {
+        group: recoveredAlertId,
+        alertState: stateToAlertMessage[AlertStates.OK],
+        timestamp: startedAt.toISOString(),
+        viewInAppUrl,
+        threshold: mapToConditionsLookup(criteria, (c) => c.threshold),
+        metric: mapToConditionsLookup(criteria, (c) => c.metric),
+      };
+      alert.setContext(context);
+    }
+
     const stopTime = Date.now();
     logger.debug(`Scheduled ${scheduledActionsCount} actions in ${stopTime - startTime}ms`);
     return {

x-pack/plugins/infra/server/lib/alerting/metric_threshold/register_metric_threshold_rule_type.ts

@@ -89,6 +89,7 @@ export async function registerMetricThresholdRuleType(
     minimumLicenseRequired: 'basic',
     isExportable: true,
     executor: createMetricThresholdExecutor(libs),
+    doesSetRecoveryContext: true,
     actionVariables: {
       context: [
         { name: 'group', description: groupActionVariableDescription },