Transfer Event Manager to New Account

Migrate Event Manager from current Podman-on-EC2 deployment to ECS on EC2 in new account.

• Current state: Container running on EC2 via Podman, Postgres RDS database
• Target state: ECS on EC2 in new account, RDS Postgres in new account
• Create ECS cluster and service definitions via IaC
• Migrate RDS Postgres database (coordinate with TBD-02)
• Configure networking (VPC, security groups, load balancer)
• Set up container image registry (ECR) in new account
• Update CI/CD pipeline to deploy to new ECS cluster
• Configure logging and monitoring
• Test application functionality after migration

Open questions:

• What is the deployment strategy? (Blue/green, rolling?)
• Are there specific resource requirements (CPU, memory)?