feat: add health and email consumer

[ObiFaith]

Description

Added health check endpoint and implemented the email consumer to handle incoming email notification events from RabbitMQ.

Type of Change

• feat: New feature
• fix: Bug fix
• docs: Documentation updates
• style: Code style/formatting changes
• refactor: Code refactoring
• perf: Performance improvements
• test: Test additions/updates
• chore: Build process or tooling changes
• ci: CI configuration changes
• other:

How Has This Been Tested?

• Manual tests – verified health endpoint returns correct status and email messages are consumed and processed successfully.
• Using RabbitMQ UI

Test Evidence

• Microservice started without errors
• RabbitMQ queue email.queue created successfully
• PostgreSQL connection established

Screenshots (if applicable)

Checklist

• My code follows the project's coding style
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published
• I have included a screenshot showing all tests passing
• I have included documentation screenshots (if applicable)

Additional Notes

This update establishes a basic health route for service monitoring and enables asynchronous email event handling through RabbitMQ.