[TASK] Raven MDA Kubernetes Setup #252
Description
What needs to be done?
Set up and validate a working Raven MDA within the infrastructure layer.
The goal is to have a functional mail delivery service that receives emails from Postfix and delivers them correctly in the target environment.
Acceptance Criteria
- Raven MDA starts successfully without errors.
- Raven receives an email from Postfix.
- A test email is delivered successfully.
- Configuration is stored under infra/.
- Basic documentation exists for setup and testing.