chore(apps): add new metric to observe experimental API bridge

apps/meteor/app/apps/server/bridges/experimental.ts

@@ -2,16 +2,30 @@ import type { IAppServerOrchestrator } from '@rocket.chat/apps';
 import { ExperimentalBridge } from '@rocket.chat/apps-engine/server/bridges';
 import { Subscriptions } from '@rocket.chat/models';
 
+import { metrics } from '../../../metrics/server/lib/metrics';
+
 export class AppExperimentalBridge extends ExperimentalBridge {
 	constructor(private readonly orch: IAppServerOrchestrator) {
 		super();
 	}
 
 	protected async getUserRoomIds(userId: string, appId: string): Promise<string[] | undefined> {
-		this.orch.debugLog(`The App ${appId} is getting the room ids for the user: "${userId}"`);
+		const stopTimer = metrics.appBridgeMethods.startTimer({
+			bridge: 'experimental',
+			method: 'getUserRoomIds',
+			app_id: appId,
+		});
+
+		try {
+			this.orch.debugLog(`The App ${appId} is getting the room ids for the user: "${userId}"`);
+
+			const subscriptions = await Subscriptions.findByUserId(userId, { projection: { rid: 1 } }).toArray();
 
-		const subscriptions = await Subscriptions.findByUserId(userId, { projection: { rid: 1 } }).toArray();
+			const result = subscriptions.map((subscription) => subscription.rid);
 
-		return subscriptions.map((subscription) => subscription.rid);
+			return result;
+		} finally {
+			stopTimer();
+		}
 	}
 }

apps/meteor/app/metrics/server/lib/metrics.ts

@@ -199,6 +199,12 @@ export const metrics = {
 		name: 'rocketchat_apps_failed',
 		help: 'total apps that failed to load',
 	}),
+	appBridgeMethods: new client.Summary({
+		name: 'rocketchat_apps_bridge_methods',
+		help: 'summary of app bridge method calls count and time',
+		labelNames: ['bridge', 'method', 'app_id'],
+		percentiles,
+	}),
 
 	// Meteor Facts
 	meteorFacts: new client.Gauge({