api_key_id — numeric ID (from generation metadata) or key hash (64-char hex from GET /api/v1/keys, resolved server-side); user — Clerk user ID (e.g. “user_abc123”), not the display name; workspace — workspace UUID, not the workspace name; app — numeric app ID, not the app title; model — permaslug (e.g. “openai/gpt-4o”), not the display name. Other dimensions (provider, origin, country, etc.) are not enriched and accept the value as returned.