feat: add staff onboarding, password setup and welcome emails

refactor(notifications): remove unused notification orchestrator imports

feat(notifications): add educational notifications

refactor(notifications): update notification cta links to use bridge routing

feat: add custom user symptom support

chore: remove unused code from the email template, adjust the width of the image logo

feat(notifications): replace reset password deeplink with web url

refactor(notifications): remove AUTH_TEMPLATES from email template

update email template

feat(notifications): enhance reset password email with deep link and updated template

feat(email): add Brevo email service with scheduled alerts and notifications

feat(notifications): replace Resend with Gmail API for email delivery

feat(email): replace nodemailer with Resend for email delivery

fix(email): enforce IPv4 DNS resolution and add retry logic

fix(email): change default SMTP port and disable connection pooling

fix(email): parse SMTP port as integer and increase timeouts

feat(notifications): integrate health assessment and enhance email service

feat(monitoring): add real-time monitoring engine with state management

Initial backend deployment with Docker and Cron jobs