task(auth): Handle second and final account delete notifications

Because:
- We want to send out a second notification about account deletion
- We want to send out a final notification about account deletion

This PR:
- Adds support to send out second in active account warning email
- Adds support to send out final in active account warning email
- Refactors InactiveAccountManager.handleFirstNotificationTask so that it can be parameterized and reused.
- Adds required glean events
- Adds required metrics

Author: dschom

libs/shared/cloud-tasks/src/lib/send-email-tasks.ts

@@ -15,6 +15,7 @@ import { CloudTaskOptions } from './cloud-tasks.types';
 export enum EmailTypes {
   INACTIVE_DELETE_FIRST_NOTIFICATION = 'inactiveDeleteFirstNotification',
   INACTIVE_DELETE_SECOND_NOTIFICATION = 'inactiveDeleteSecondNotification',
+  INACTIVE_DELETE_FINAL_NOTIFICATION = 'inactiveDeleteFinalNotification',
 }
 export type CloudTaskEmailType = (typeof EmailTypes)[keyof typeof EmailTypes];
 

packages/fxa-auth-server/lib/email-cloud-tasks.ts

@@ -123,7 +123,20 @@ export class EmailCloudTaskManager {
     // @TODO FXA-10574, FXA-10942
     switch ((request.payload as SendEmailTaskPayload).emailType) {
       case EmailTypes.INACTIVE_DELETE_FIRST_NOTIFICATION:
-        await this.inactiveAccountsManager.handleFirstNotificationTask(
+        await this.inactiveAccountsManager.handleNotificationTask(
+          'first',
+          request.payload as SendEmailTaskPayload
+        );
+        break;
+      case EmailTypes.INACTIVE_DELETE_SECOND_NOTIFICATION:
+        await this.inactiveAccountsManager.handleNotificationTask(
+          'second',
+          request.payload as SendEmailTaskPayload
+        );
+        break;
+      case EmailTypes.INACTIVE_DELETE_FINAL_NOTIFICATION:
+        await this.inactiveAccountsManager.handleNotificationTask(
+          'final',
           request.payload as SendEmailTaskPayload
         );
         break;