Register services with health checks and query the catalog through DNS, API, CLI, UI, or prepared queries based on consumer needs. Apply this to the multi-region web portal with controls that are documented, testable, and owned by the right team.

Hardcode all service IP addresses in application configs. This would leave the multi-region web portal dependent on manual intervention or excessive privilege.

Treat a registered service as healthy without health checks. This fails the scalable governance requirement for the government agency.

Use only manual spreadsheets as the service catalog. This does not address the operational constraint that the solution must work across production and staging.