feat(telemetry): add keychain availability and token storage metrics (#18971)

packages/core/src/utils/events.ts

@@ -9,6 +9,10 @@ import type { AgentDefinition } from '../agents/types.js';
 import type { McpClient } from '../tools/mcp-client.js';
 import type { ExtensionEvents } from './extensionLoader.js';
 import type { EditorType } from './editor.js';
+import type {
+  TokenStorageInitializationEvent,
+  KeychainAvailabilityEvent,
+} from '../telemetry/types.js';
 
 /**
  * Defines the severity level for user-facing feedback.
@@ -168,6 +172,8 @@ export enum CoreEvent {
   EditorSelected = 'editor-selected',
   SlashCommandConflicts = 'slash-command-conflicts',
   QuotaChanged = 'quota-changed',
+  TelemetryKeychainAvailability = 'telemetry-keychain-availability',
+  TelemetryTokenStorageType = 'telemetry-token-storage-type',
 }
 
 /**
@@ -198,6 +204,8 @@ export interface CoreEvents extends ExtensionEvents {
   [CoreEvent.RequestEditorSelection]: never[];
   [CoreEvent.EditorSelected]: [EditorSelectedPayload];
   [CoreEvent.SlashCommandConflicts]: [SlashCommandConflictsPayload];
+  [CoreEvent.TelemetryKeychainAvailability]: [KeychainAvailabilityEvent];
+  [CoreEvent.TelemetryTokenStorageType]: [TokenStorageInitializationEvent];
 }
 
 type EventBacklogItem = {
@@ -367,6 +375,14 @@ export class CoreEventEmitter extends EventEmitter<CoreEvents> {
       );
     }
   }
+
+  emitTelemetryKeychainAvailability(event: KeychainAvailabilityEvent): void {
+    this._emitOrQueue(CoreEvent.TelemetryKeychainAvailability, event);
+  }
+
+  emitTelemetryTokenStorageType(event: TokenStorageInitializationEvent): void {
+    this._emitOrQueue(CoreEvent.TelemetryTokenStorageType, event);
+  }
 }
 
 export const coreEvents = new CoreEventEmitter();