Refactor health check DTOs around a common CheckResult contract and remove the\nlegacy HealthChecks aggregate object.\n\nAdd a dedicated /api/v1/health/oracle endpoint with response mapping, OpenAPI\nschema updates, and Bruno request coverage.\n\nAlign feature, unit, integration, architecture and OpenAPI tests with the new\nset-based checks representation and make Oracle health tests deterministic in CI.\n\nUpdate command documentation to the uwil:* command namespace.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
