OK - Diagram cost snapshot returned.

Bad Request - The server cannot process the request, often due to a malformed request.

Unauthorized - Invalid API key.

Forbidden - Either the resource does not exist, or the caller is not authorized to access it. These two cases are deliberately indistinguishable to avoid information disclosure: the access guard runs before any existence check, so callers receive 403 (not 404) for unknown IDs on this endpoint. Used by Cloud Diagrams routes keyed by a path-param resource id (e.g. /clouddiagrams/v1/statussheet/{id}/...).