WFM API 403 on Bulk Schedule Publish for External Org

Struggling to figure out why our AppFoundry integration receives a 403 Forbidden when publishing schedules via the /api/v2/wfm/schedules endpoint.

The OAuth token possesses the wfm:schedule:write scope, and the request originates from the correct external organization ID configured in the multi-tenant setup.

Direct calls from Postman succeed, but our Node.js service using the official SDK fails consistently during the bulk publish phase.

The error payload indicates a permissions mismatch despite identical scopes, suggesting a potential issue with how the SDK handles cross-org context.