fix(GRO-2012): pass portalSessionId to RescheduleFlow for SSO bridge customers (closes#38)
- src/portal/CustomerPortal.tsx:329 - use portalSessionId fallback for RescheduleFlow
- src/__tests__/portal.test.tsx - new regression test
- UAT_PLAYBOOK.md §5.26 - new test cases
cc @cpfarhood
Co-Authored-By: Paperclip <noreply@paperclip.ing>