[Infrastructure] Achieve staging environment parity with production

[Penielka]

Overview

Ensure the staging environment mirrors production in configuration, data volume, and infrastructure to catch issues before deployment.

Acceptance Criteria

• Same infrastructure as production (scaled down)
• Anonymized production data sync for realistic testing
• Same environment variables and secrets structure
• Automated smoke tests run after staging deploy
• Staging health dashboard

Priority: Medium

Prevents 'works on my machine' and staging-specific regressions.

[eleven-smg]

Hi maintainer I have thoroughly read the description to this issue and I can resolve this according to the description required ensuring it meet all the acceptance criteria kindly assign.

[grantfox-oss]

🦊 GrantFox — @eleven-smg has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #285)
2. Your PR will be reviewed by the AetherEdu maintainers

Good luck! Track your progress on GrantFox.