feat: Implement Phase 2 cross-cutting services with email and notification enhancements

- Refactor email verification and password reset utilities to use new email service.
- Introduce email delivery queue and notification delivery model for better tracking.
- Enhance file validation and storage services for improved security and ownership management.
- Add cron job for cleaning inactive notifications with retention policy.
- Update document worker to handle document generation and storage more efficiently.
- Implement logging improvements in activity and log workers.
- Create comprehensive documentation for new API endpoints and services.
- Add unit tests for file validation and notification policies to ensure robustness.

app/services/auth/email.service.js

@@ -1,6 +1,6 @@
-const { sendMail } = require("../../utils/mail.util");
+const emailService = require("../email/email.service");
 
-const sendLoginOtp = (user, otp) => sendMail({ to: user.email, subject: "Your ZUMRI login code", templateName: "otp", templateVars: { firstName: user.firstName, otp }, text: `Your ZUMRI login code is ${otp}.` });
-const sendPasswordChanged = (user) => sendMail({ to: user.email, subject: "Your ZUMRI password was changed", templateName: "passwordChanged", templateVars: { customer_name: user.firstName, changed_at: new Date().toLocaleString() }, text: "Your ZUMRI password was changed. Contact support if this was not you." });
+const sendLoginOtp = (user, otp) => emailService.send({ templateKey: "otp", recipient: user.email, userId: user.id, variables: { firstName: user.firstName, otp } });
+const sendPasswordChanged = (user) => emailService.send({ templateKey: "passwordChanged", recipient: user.email, userId: user.id, variables: { customer_name: user.firstName, changed_at: new Date().toLocaleString() } });
 
 module.exports = { sendLoginOtp, sendPasswordChanged };