The usage identity exported the same variable the scope registry reads to
partition workspace scopes, so a backend started with the usage environment
(61d1b61b) could not see scopes provisioned under the workspace-derived id
(5a882492) and every scope lookup 404'd. Usage attribution now reads
EVOSCIENTIST_USAGE_DEPLOYMENT_ID; the scope side keeps the original variable.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>