Problem(AWS AMI): No basic validation for AMI functionality

[MicBun]

We need simple smoke tests to ensure AMIs work correctly before release. Without basic validation, we might release broken AMIs that fail to start properly.

Acceptance Criteria:

• Add basic AMI smoke test to build pipeline (instance launches, services start)
• Create simple health check script that validates node functionality
• Test AMI deployment in CI before marking release as complete

[MicBun]

have been resolved in previous PRs