A catalog rather than arbitrary query access
An extensible system can still have bounded interfaces. Curated query identifiers make caching, testing, and public/private review tractable. Exposing a generic datasource proxy would turn the portal into a much broader data-access surface.
Integration versus migration
Centralizing investigation is usually less disruptive than centralizing every service's infrastructure ownership. Preserve one writer for each resource. If ownership must move, import existing state and disable the old writer before enabling the new one.
Acceptance criteria
The integration is complete only when the application can be diagnosed from symptoms to dependencies with real evidence. Empty charts and links alone are not a substitute for working telemetry. Document any unavailable signal explicitly and retain the established production compatibility checks.