The registry-derived scrub union is best-effort and returns empty when
hermes_cli.auth can't be imported (WebUI-only CI/test env). That made
ANTHROPIC_TOKEN / CLAUDE_CODE_OAUTH_TOKEN scrubbing depend on the agent being
installed, so the quota-subprocess regression failed on CI (agent absent) while
passing locally (agent present). Add both token names to the fail-closed floor
set so the scrub covers them regardless of the registry import — strictly more
correct (defense-in-depth) and deterministic across environments.
Co-authored-by: rodboev <rodboev@users.noreply.github.com>